
Fire Valves For Pn 16, With Fire Hose Couplings Type C Or B And With Flange Connection
出版:German Institute for Standardisation (Deutsches Institut für Normung)

专家解读视频
Fire Valves For Pn 16, With Fire Hose Couplings Type C Or B And With Flange Connection
出版:German Institute for Standardisation (Deutsches Institut für Normung)
专家解读视频