
Unplasticized polyvinyl chloride (PVC-U) valves; PN 6 and PN 10 wafer type butterfly valves; dimensions
出版:German Institute for Standardisation (Deutsches Institut für Normung)

专家解读视频
Unplasticized polyvinyl chloride (PVC-U) valves; PN 6 and PN 10 wafer type butterfly valves; dimensions
出版:German Institute for Standardisation (Deutsches Institut für Normung)
专家解读视频