DCS价格

参考价格:¥366.2990

型号:DCS.91.G90.6E200 品牌:LEMO 备注:这里有DCS多少钱,2025年最近7天走势,今日出价,今日竞价,DCS批发/采购报价,DCS行情走势销售排行榜,DCS报价。
型号 功能描述 生产厂家&企业 LOGO 操作
DCS

Voltage and resistor-based trim

文件:1.07984 Mbytes Page:20 Pages

deltaDelta Electronics, Inc.

台达电子台达电子工业股份有限公司

delta

High Definition Oscilloscopes

CombiningTeledyneLeCroy’sHD4096highdefnition12-bittechnology,withlongmemory,acompactformfactor,12.1”touchscreendisplayandpowerfuldebugtools,theHDO4000istheidealoscilloscopeforprecisemeasurementsandquickdebug.ToolssuchasWaveScanSearchandFind,LabNotebookRep

TELEDYNETeledyne Technologies Incorporated

华特力科

TELEDYNE

D-SUBMINIATURE CRIMP AND POKE SYSTEM

INTRODUCTION: AdamTechCrimpandPokeD-SubconnectorsareapopularinterfaceformanyI/Oapplications.Offeredin9,15,25,37and50positionstheyarealowcostalternativetosolderingaconnectortocable.Contactsarecrimpedontodiscretewiresandpushedintotheconnectorbody.The

ADAM-TECHAdam Technologies, Inc.

亚当科技亚当科技股份有限公司

ADAM-TECH

D-SUBMINIATURE CRIMP AND POKE SYSTEM

INTRODUCTION: AdamTechCrimpandPokeD-SubconnectorsareapopularinterfaceformanyI/Oapplications.Offeredin9,15,25,37and50positionstheyarealowcostalternativetosolderingaconnectortocable.Contactsarecrimpedontodiscretewiresandpushedintotheconnectorbody.The

ADAM-TECHAdam Technologies, Inc.

亚当科技亚当科技股份有限公司

ADAM-TECH

D-SUBMINIATURE CRIMP AND POKE SYSTEM

INTRODUCTION: AdamTechCrimpandPokeD-SubconnectorsareapopularinterfaceformanyI/Oapplications.Offeredin9,15,25,37and50positionstheyarealowcostalternativetosolderingaconnectortocable.Contactsarecrimpedontodiscretewiresandpushedintotheconnectorbody.The

ADAM-TECHAdam Technologies, Inc.

亚当科技亚当科技股份有限公司

ADAM-TECH

D-SUBMINIATURE CRIMP AND POKE SYSTEM

INTRODUCTION: AdamTechCrimpandPokeD-SubconnectorsareapopularinterfaceformanyI/Oapplications.Offeredin9,15,25,37and50positionstheyarealowcostalternativetosolderingaconnectortocable.Contactsarecrimpedontodiscretewiresandpushedintotheconnectorbody.The

ADAM-TECHAdam Technologies, Inc.

亚当科技亚当科技股份有限公司

ADAM-TECH

D-SUBMINIATURE CRIMP AND POKE SYSTEM

INTRODUCTION: AdamTechCrimpandPokeD-SubconnectorsareapopularinterfaceformanyI/Oapplications.Offeredin9,15,25,37and50positionstheyarealowcostalternativetosolderingaconnectortocable.Contactsarecrimpedontodiscretewiresandpushedintotheconnectorbody.The

ADAM-TECHAdam Technologies, Inc.

亚当科技亚当科技股份有限公司

ADAM-TECH

D-SUBMINIATURE CRIMP AND POKE SYSTEM

INTRODUCTION: AdamTechCrimpandPokeD-SubconnectorsareapopularinterfaceformanyI/Oapplications.Offeredin9,15,25,37and50positionstheyarealowcostalternativetosolderingaconnectortocable.Contactsarecrimpedontodiscretewiresandpushedintotheconnectorbody.The

ADAM-TECHAdam Technologies, Inc.

亚当科技亚当科技股份有限公司

ADAM-TECH

DC-DC CONVERTER

DC-DCCONVERTER

deltaDelta Electronics, Inc.

台达电子台达电子工业股份有限公司

delta

DC-DC CONVERTER

DC-DCCONVERTER

deltaDelta Electronics, Inc.

台达电子台达电子工业股份有限公司

delta

DC-DC CONVERTER

DC-DCCONVERTER

deltaDelta Electronics, Inc.

台达电子台达电子工业股份有限公司

delta

DC-DC CONVERTER

DC-DCCONVERTER

deltaDelta Electronics, Inc.

台达电子台达电子工业股份有限公司

delta

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

NON- FUSED DISCONNECT SWITCHES

FEATURESANDBENEFITS •CompleteassembledswitcheswithoperatinghandlesforJITmanufacturingandreducedinventory. •Installationsavailableforbothdoormountandpanel/basemount. •10kAshortcircuitratingat600VACwithClassJfuses. •Positivedrivetoopendoublebreakcontacts

ATC

American Technical Ceramics Corp

ATC

DCS产品属性

  • 类型

    描述

  • 型号

    DCS

  • 制造商

    Middle Atlantic Products

更新时间:2025-6-24 18:12:00
IC供应商 芯片型号 品牌 批号 封装 库存 备注 价格
MICROCHIP/微芯
25+
NA
996880
只做原装,欢迎来电资询
QUKLOG
24+
NA/
3445
原装现货,当天可交货,原型号开票
KORCHIP
23+
NA
28650
主营品牌深圳百分百原装现货假一罚十绝对价优
2017+
SMD
1585
只做原装正品假一赔十!
DIAMOND
2015+
SOP/DIP
19889
一级代理原装现货,特价热卖!
BB
18+
SOP
85600
保证进口原装可开17%增值税发票
ITTCANNON
24+/25+
27
原装正品现货库存价优
DELTA
22+
DIP
5000
只做原装,假一赔十
TAISEI
23+
SMD
8888
专做原装正品,假一罚百!
JRC
23+
原厂封装
14097

DCS芯片相关品牌

  • AMPHENOL
  • CK-COMPONENTS
  • DDK
  • GLENAIR
  • MACOM
  • Mitsubishi
  • MOLEX6
  • Panasonic
  • POWERDYNAMICS
  • RHOMBUS-IND
  • TELEDYNE
  • YAMAICHI

DCS数据表相关新闻