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| 斜直井倾斜钻机; 倾斜式钻机 | |||
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| 斜直钻井倾斜式钻机; 倾斜式钻机 | |||
| 斜向钻机; 斜直井钻机 | |||
| slanted rig: 5 phrases in 2 subjects |
| Drilling | 2 |
| Oil / petroleum | 3 |
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