手動陶瓷刀型閘閥manual knife gate valve
設計制造 Design and manufacture: JB/T8691-1998
結構長度 structural length: GB/T15188.2-94
法蘭連接 Flange connection: GB/T9113.1-2000 JB/T79-94
試驗與驗收  testing and acceptance:GB/T13927-92
主要零部件材質  Key parts material