标准资料网-标准资料免费资源平台

【英文标准名称】:Roughnesscomparisonspecimens.Specificationforspark-eroded,shot-blasted,grit-blasted,andpolishedspecimens
【原文标准名称】:表面粗糙度比对试样.第2部分:电火花加工、喷丸处理、喷砂处理及抛光试样规范
【标准号】:BS2634-2-1987
【标准状态】:作废
【国别】:英国
【发布日期】:1987-02-27
【实施或试行日期】:1987-02-27
【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】:表面粗糙度测定;试样;喷砂清理;抛光;表面性质;比较试验;电解清洗;控制样品;公差;喷净法;表面纹理;粗砂岩;粗糙度;校正;抽样方法;清洁处理;外观检查(试验);等级(质量);作标记;表面处理
【英文主题词】:Controlsamples;Dimensions;Finishes;Marking;Roughness;Roughness(surface);Specifications;Surface-roughnessmeasurement
【摘要】:Characteristicsofspecimensintendedfortactileandvisualcomparisonwithworkpiecesurfacesofsimilarlay,producedbysimilarmanufacturingmethods.
【中国标准分类号】:J04
【国际标准分类号】:17_040_20
【页数】:8P;A4
【正文语种】:英语


Product Code:SAE AS452
Title:Oxygen Mask Assembly, Demand and Pressure Breathing, Crew (NONCURRENT Jan 1999)
Issuing Committee:A-10 Aircraft Oxygen Equipment Committee
Scope:The purpose of this standard is to establish optimum standards for crew demand and pressure-breathing oxygen mask assemblies for use by crew members in civil aircraft. This standard covers both general type and quick-donning type mask assemblies in the following classes: a. Class A, oronasal, demand b. Class B, oronasal, pressure-demand c. Class C, full face, demand d. Class D, full face, pressure-demand