【英文标准名称】:Analysisofironores-Methodsforthedeterminationofsiliconcontent-Gravimetricmethods
【原文标准名称】:铁矿石分析.第5部分:硅含量测定方法.第1节:重力测定法
【标准号】:BS7020-5.1-1993
【标准状态】:现行
【国别】:英国
【发布日期】:1993-10-15
【实施或试行日期】:1993-10-15
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:含量测定;浓度(化学);精密度;蒸发残余物测定;浓缩物;重量分析;试剂溶液;统计方法分析;烧结产品;金属矿;矽;硅;团料;再现性;化学分析和试验;铁矿石
【英文主题词】:Chemicalanalysisandtesting;Determinationofcontent;Gravimetricanalysis;Ironores;Siliconcontent
【摘要】:Twomethodsforthedeterminationofsiliconcontentsbetween1%(m/m)and15%(m/m)(withcertainlimitations)ofironores.
【中国标准分类号】:D31
【国际标准分类号】:73_060_10
【页数】:16P.;A4
【正文语种】:英语


Product Code:SAE ARP4005
Title:Selection and Application of Relays for Proper Performance
Issuing Committee:Ae-8b3 Relays Committee
Scope: This Aerospace Recommended Practice (ARP) provides information to guide the selection of electromechanical relays in both electrical and electronic circuits and their application in aerospace, ground, and shipboard systems to achieve proper performance. Relays intended for use in aerospace industry and military applications are substantially different from those produced for industrial applications. Most industrial relays are designed so that the user can cover contact sets from NO to NC (and vice versa); add and replace auxiliary contact sets; change ore replace coils; use coils on systems up to 600 V 50 to 60 Hz; and expect relays to last for many operations. Aerospace relays are designed to be nonrepairable with fixed contact configuration, relatively short life, and generally for systems not exceeding 200 V and 400 Hz. A family of relays is approved by the military for applications not exceeding 270 VDC. All of these relays are sealed. Adjustment is not possible. A user can make no changes after relays leave the producing facility. These relays are high-performance, low volume and low mass types with short life, when compared to industrial types, and have little margin to tolerate an application or selection error. Relays approved for aerospace by the military are summarized in MIL-STD-1346. This standard provides a current listing of military standard relays. The user then evaluate these relays to determine with relays are most suitable for the application at hand and select the military relay part number from the detail specification sheet. Each of the manufacturers employ a staff of applications engineers who should be consulted if there is uncertainty in matching a relay to a specific application.