加快国内外标准接轨。
分析了《城镇燃气设计规范》与国内外标准的异同。
The sameness and difference between Code for Design of City Gas Engineering and internal and external standards are analyzed.
综合概述了套接式管接头的特点、应用、国内外标准等。
This article Outlines the features, application and applicable standards at home and abroad of casing pipe union, etc.
应用推荐