Multilayer piping systems for hot and cold water installations inside buildings - Part 7: Guidance for the assessment of conformity (ISO/TS 21003-7:2008); German version CEN ISO/TS 21003-7:2008
建筑物内冷热水装置用多层管道系统.第7部分:合格评定指南(ISO/TS 21003-7-2008);德国版CEN ISO/TS 21003-7:2008