DIN 3546-1-2002 | 建筑物内供水装置用截流阀.第1部分:放水阀,门阀和隔膜阀用手动活塞型门阀,截流阀和活塞的一般要求和检验.DV | (Stopvalves for domestic water supply - Part 1: General requirementstests for manually operated piston type gate valves, stopvalves for tapping valves, gate valvesdiaphragm valves; Technical rule of the DVGW) |