- marine valve
- 船: boat; ship; vessels
- 用: 40分钟跑完全程 run the course in 4 ...
- 阀门: valve; tap
- 通用阀门: general ale; general purpose industrial valves-flanged and butt-weld end steel ball valves; general valve
- 通用阀门铁制旋启式止回阀: general purpose industrial valves-cast iron swing check valves
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