drilling derrick
| substructure
| drilling derrick | |
| tech. | 钻塔; 钻井起重机架 |
| substructure | |
| bridg.constr. | 下部建筑 |
| desert. | 下层结构 |
| econ. | 社会基础 |
| hydroel.st. | 基础 |
| hydroel.st. од. | 下部结构 |
| met. | 地基 |
| met. од. | 亚结构 |
| oil | 底层结构; 亚构造 |
| oil од. | 下层建筑 |
| |||
| 钻塔; 钻井起重机架 | |||
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drilling derrick : 36 phrases in 4 subjects |
| Mechanics | 1 |
| Nautical | 1 |
| Oil / petroleum | 1 |
| Technology | 33 |