ASTM F3390-20 3到24英寸的标准规范 土地排水用内衬柔性波纹聚乙烯管.pdf文档页数:8文档大小:4.33MB文档格式:pdf This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision
GB/T 26922-2011 服务业节水型单位评价导则.pdf文档页数:9文档大小:172.9KB文档格式:pdf ICS03.100.01 F01 GB 中华人民共和国国家标准 GB/T26922-2011 服务业节水型单位评价导则 Guide for evaluating water saving users in service industry 2011-09-29发布 2012-03-01实