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| 悬挂式封隔器 | |||
| 悬挂式井壁封隔器 | |||
| 挂壁式封隔器; 井壁悬挂式封隔器 | |||
| 悬吊式堵塞器; 壁钩型封隔器 | |||
| hook wall packer: 8 phrases in 3 subjects |
| Drilling | 1 |
| Oil / petroleum | 3 |
| Technology | 4 |
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