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套管通径
| 规
| 套管通径 | |
| dril. | drift casing |
| B & S 规 | |
| railw. | Brown and Sharpe Gauge |
| B & S规 | |
| earth.sc. | ge brown and sharpe wire gage; ge brown and sharpe wire gauge |
| 规 | |
| gen. | caliber |
| busin. | bar |
| dril. | gauge; gage |
| |||
| drift casing | |||
| run through casing size; drifting of casing | |||
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套管通径 : 3 phrases in 1 subject |
| Drilling | 3 |
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