JIS F 7373-1996 Shipbuilding-Cast iron 10K swing check valves.pdf附件大小：0MB附件格式：1个直链文件，格式为rar 资源简介：0...

BS 1868-1975(R1990) Steel check valves(flanged and butt-welding ends) for the petroleumpetrochemical and allied industries.pdf附件大小：0MB附件格式：1个直链文件，格式为rar 资源简介：BS1868-1975(R1990)Steelcheckvalves(flangedandbutt-weldingends)forthepetro...