手动刀形闸阀 PZ73H/X/F
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
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