停止阀 meaning in English

cut off out valve
cut off valve
cut out valve
stopvalve
stovalve
valve， shut off
valve， stop

Technical specifications for valves for shipboard use - part 4 : stop valves
船用阀门技术规范.第4部分:停止阀
Also used for general stop valve symbol when amplified by specification
如果有进一步的说明，也可用作通用的停止阀。
Technical specifications for valves for shipboard use - part 6 : hand operated gate valves
船用阀门技术规范.第6部分:手动停止阀