Should be fully open before the start of suction and discharge pipe valves, non-closing valve started.

启动前应全开吸入和排出管路中的阀门，严禁闭阀启动。

youdao

Should be fully open before the start of the suction and discharge pipe valves, non-closing valve to start.

启动前应全开吸入和排出管路中的阀门，严禁闭阀启动。

youdao

A beam-line vacuum interlock protecting system consists of fast-closing valve, gate valves, sensors and control system.

光束线真空联锁保护系统主要由快阀、门阀、压力传感器(真空规)和控制系统等组成。

youdao

He said in such a situation, normal procedure would be for the contractor's crew to secure the well by closing off the huge valve sitting on the seabed known as a blowout preventer.

WSJ: BP Tries to Shift Blame for Spill to Transocean