sinking by boring
| method
| sinking by boring | |
| tech. | 钻井法凿井 |
| method | |
| gen. | 法; 标准; 水平 |
| environ. | 方法 |
| hydroel.st. од. | 方法 |
| mech. | 电火花法 |
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| 钻井法凿井 | |||
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sinking by boring : 1 phrase in 1 subject |
| Mineralogy | 1 |