弹簧直接载荷式安全阀
Spring loaded safety valves
检测标准
安全阀一般要求
Safety valves-General requirements
减压阀性能试验方法
Methods of performance test for pressure reducing valves
几何光学术语、符号
Vocabulary and character for geometrical optics
减压阀一般要求
General requirements for pressure reducing valves
铁制旋塞阀
Iron plug valves
石油、化工及相关工业用的钢制旋启式止回阀
Steel swing check valve for petroleum,petrochemical and allied industries
通用阀门 铁制截止阀与升降式止回阀
General purpose industrial valves-Casting iron globevalves and lift check valves
多回转阀门驱动装置的连接
Multi-turn valve actuator attachments
通用阀门 碳素钢铸件技术条件
General purpose industrial valves Specification of carbon steel castings
