| |||
surface controlled subsurface safety valve | |||
subsurface safety system | |||
downhole safety valve; subsurface safety valve |
скважинный предохранительный клапан: 9 phrases in 6 subjects |
Oil / petroleum | 1 |
Oil and gas | 2 |
Oil and gas technology | 2 |
Oilfields | 1 |
Sakhalin A | 1 |
Tengiz | 2 |