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| 可钻封隔器 | |||
| 可钻式封隔器 | |||
| 可钻掉的封隔器 | |||
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drillable packer : 5 phrases in 4 subjects |
| Drilling | 1 |
| Mining | 1 |
| Oil / petroleum | 2 |
| Technology | 1 |
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