PZ73手动刀型闸阀,手动插板阀
动对夹式刀形闸阀manual butt-clamp knife gate valve
设计制造 Design and manufacture: JB/T8691-1998
结构长度 structural length: GB/T15188.2-94
法兰连接 Flange connection: GB/T9113.1-2000 JB/T79-94
试验与验收 testing and acceptance:GB/T13927-92
主要零部件材质 Key parts material
