1)pressure test plug,压力测试(放泄)塞2)oil pressure test plug,油压力测试塞3)pressure test tap,压力测试(点)旋塞4)return oil leakage test pressure,回油泄漏测试压力5)Pressure/vacuum relief valves,压力真空泄放阀6)safety pressure relief valve,安全压力放泄阀
用法例句
Pressure/vacuum relief valves for low pressure storage tanks protection;
