2026-05-06 08:29 浏览次数 16
燃气管网
Specification for corrugated stainless steel semi-rigid pipe and associated fittings for low-pressure gas pipework of up to 28 mm
最大直径为28mm的输送低压气体管道系统用波状不锈钢半硬式管和有关配件规范
Means for resealing threaded joints of gas pipework in buildings.
建筑物燃气管道工程的螺纹接头再密封的方法