MIL-STD-171E, DEPARTMENT OF DEFENSE MANUFACTURING PROCESS STANDARD: FINISHING OF METAL AND WOOD SURFACES (23 JUN 1989)., This standard establishes and updates general finish codes and serves as a general guide to the selection of suitable materials, procedures, and systems for cleaning, plating, painting, and the otherwise finishing of metal and wood surfaces.【英文标准名称】:Measurementproceduresforductedsilencers;insertionloss,transmissionloss,flownoise,totalpressureloss 【原文标准名称】:通道内隔声的测量.插入衰减程度.直射波的衰减程度流体噪声.总压强损耗 【标准号】:DIN45646-1988 【标准状态】:作废 【国别】:德国 【发布日期】:1988-09 【实施或试行日期】: 【发布单位】:德国标准化学会(DIN) 【起草单位】: 【标准类型】:() 【标准水平】:() 【中文主题词】:声学测量;声强;声学;测量;通风设备;运河;定义;管道;发动机消音器;通风道工程;流动 【英文主题词】:acoustics;ducts;ventilationductwork;measurement;ventilationequipment;flow;soundintensity;definitions;enginesilencers;canals;acousticmeasurement 【摘要】: 【中国标准分类号】:Z32 【国际标准分类号】:0270 【页数】:26P;A4 【正文语种】:德语