ICS91.140.40P 47备案号：47795-2015DB31市地方标准上海DB 31/ T900—2015住宅燃气输送用不锈钢波纹软管施工及验收规程Specification for construction and acceptance of stainless steel pliable corrugatedtubing used in residential gas piping systems2015 - 04 - 24 发布2015 - ...

时间:2025-01-22 03:26栏目:行业资料