【英文标准名称】:Definitionsofphysicalquantitiesforfundamentalfrequencyandtimemetrology
【原文标准名称】:基本频率和时间计量学用物理量定义
【标准号】:IEEE1139-1988
【标准状态】:作废
【国别】:美国
【发布日期】:1988
【实施或试行日期】:
【发布单位】:美国电气电子工程师学会(IEEE)
【起草单位】:IEEE
【标准类型】:()
【标准水平】:()
【中文主题词】:频率测量;测量技术;时间测量;电气工程;定义
【英文主题词】:timemeasurement;measuringtechniques;electricalengineering;frequencymeasurement;definition
【摘要】:
【中国标准分类号】:A42
【国际标准分类号】:17_080
【页数】:20P;A4
【正文语种】:英语


Product Code:SAE AMS4189
Title:Aluminum Alloy Welding Wire, 4.1Si -0.20 Mg (4643)
Issuing Committee:Ams D Nonferrous Alloys Committee
Scope:This specification covers an aluminum alloy in the form of welding wire.This wire has been used typically as filler metal for gas-metal-arc or gas-tungsten-arc welding of heavy sections of aluminum alloys of similar composition to produce joints having inherently low dilution ratio of base-metal to weld-metal, and where the weldment may require solution and/or precipitation heat treatment, but usage is not limited to such applications.