ISO 6848-1984 惰性气体保护的电弧焊接、以及等离子气体切割和焊接用的钨极编码
时间:2024-05-29 19:58:45 来源: 标准资料网 作者：标准资料网 阅读：9777
【英文标准名称】:Tungstenelectrodesforinertgasshieldedarcwelding,andforplasmacuttingandwelding;Codification
【原文标准名称】:惰性气体保护的电弧焊接、以及等离子气体切割和焊接用的钨极编码
【标准号】:ISO6848-1984
【标准状态】:作废
【国别】:国际
【发布日期】:1984-12
【实施或试行日期】:
【发布单位】:国际标准化组织(ISO)
【起草单位】:ISO/TC44
【标准类型】:()
【标准水平】:()
【中文主题词】:尺寸;包装件;电弧焊接;名称与符号;钨电极;等离子电弧焊;电弧切割;钨;规范;包装;作标记;气体保护焊;焊接;电焊条
【英文主题词】:
【摘要】:
【中国标准分类号】:J64
【国际标准分类号】:25_160_20
【页数】:4P;A4
【正文语种】:英语
【英文标准名称】:Ultrasonics-Hydrophones-Part2:Calibrationforultrasonicfieldsupto40MHz
【原文标准名称】:超音波学.水听器.第2部分:超音波场小于40MHz的校准
【标准号】:IEC62127-2-2007
【标准状态】:现行
【国别】:国际
【发布日期】:2007-08
【实施或试行日期】:
【发布单位】:国际电工委员会(IX-IEC)
【起草单位】:IEC/TC87
【标准类型】:()
【标准水平】:()
【中文主题词】:声学测量;校正;特性;定义;描述;电气工程;电声学;电医学;现场测量;频率;频率范围;水听器;测量;测量条件;测量技术;医学科学;压电的;灵敏度;声场;声压;规范(验收);超声波装置;超声波频率;超声测试;超声波学
【英文主题词】:Acousticmeasurement;Calibration;Characterisations;Characteristics;Definitions;Descriptions;Electricalengineering;Electroacoustics;Electromedicine;Fieldmeasurement;Frequencies;Frequencyranges;Hydrophones;Measurement;Measurementconditions;Measuringtechniques;Medicalsciences;Piezoelectric;Sensitivity;Soundfields;Soundpressure;Soundtransducer;Specification(approval);Ultrasonicdevices;Ultrasonicfrequencies;Ultrasonictesting;Ultrasonics
【摘要】:ThispartofIEC62127specifies:?absolutehydrophonecalibrationmethods;?relative(comparative)hydrophonecalibrationmethods.Recommendationsandreferencestoacceptedliteraturearemadeforthevariousrelativeandabsolutecalibrationmethodsinthefrequencyrangecoveredbythisstandard.Thisstandardisapplicableto?hydrophonesusedformeasurementsmadeinwaterandintheultrasonicfrequencyrangeupto40MHz;NOTE1Althoughsomephysiotherapymedicalapplicationsofmedicalultrasoundaredevelopingwhichoperateinthefrequencyrange40kHzto100kHz,theprimaryfrequencyrangeofdiagnosticimagingremainsabove2MHz.Ithasrecentlybeenestablishedthat,eveninthelattercase,thehydrophoneresponseatsubstantiallylowerfrequenciescaninfluencemeasurementsmadeofkeyacousticparameters[1].?hydrophonesemployingcircularpiezoelectricsensorelements,designedtomeasurethepulsedwaveandcontinuouswaveultrasonicfieldsgeneratedbyultrasonicequipment;NOTE2Somehydrophonescanhavenon-circularactiveelements,arisingfromslightdeviationsfromacircularstructurecaused,forexamplebyelectrodestructure,orconversely,theactiveelementscanactuallybesquares.Theclauseswithinthisstandardremainvalid,although,inthesecases,specialattentionshouldbepaidtothedirectionalresponseandtotheeffectiveradiioftheactiveelementthroughvariousaxesofrotation.?hydrophoneswithorwithoutahydrophonepre-amplifier.
【中国标准分类号】:L31
【国际标准分类号】:17_140_50
【页数】:83P.;A4
【正文语种】:英语
Product Code:SAE AMS6455
Title:Steel, Sheet, Strip, and Plate, 0.95Cr - 0.22V (0.48 - 0.53C) (SAE 6150)
Issuing Committee:Ams E Carbon And Low Alloy Steels Committee
Scope:This specification covers an aircraft-quality, low-alloy steel in the form of sheet, strip, and plate.