It's a key problem to choose and fix the control valvewell and make it run in high level condition.
选择和安装好调节阀，使调节阀在一个高水平状态下运行将是一个很关键的问题。
2
The special sealing system of this valvewell ensures the high sealing performance from ultra low temperature to ultra high temperature.
本阀的特殊密封系统可保证从超低温至超高温各温度范围具有较高的密封性能。
3
The well is still gushing, however. BP's technicians have been unable to activate the blow-out preventer, essentially a massive valve that must be operated remotely by robot submarines.