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套管重量
| 范围
| 套管 重量 | |
| dril. | casing weight |
| 范围 | |
| hydroel.st. | scope; extent; territory |
| math. | coverage |
| rem.sens. | sweep |
| tech. | range; area |
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| casing weight | |||
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| casing weight | |||
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| casing weight | |||
| 套管重量: 5 phrases in 3 subjects |
| Drilling | 2 |
| Oil / petroleum | 1 |
| Technology | 2 |