ASMEB1692018(Revision of ASME B16.9-2012)The American Society ofMechanical EngineersFactory-Made Wrought Buttwelding FittingsAN AMERICAN NATIONAL STANDARDASME B16.9-2018(Revision of ASME B16.9-2012)The American Society ofMechanical EngineersFactoiy-Made Wrought Buttwelding FittingsAN AMERICAN NATION...

时间:2024-11-26 21:50栏目:行业资料