drill tower
| substructure
| drill tower | |
| dril. | 井架; 钻塔 |
| met. | 钻架 |
| 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 |
| |||
| 井架; 钻塔 | |||
| 钻架 | |||
| 训练塔 | |||
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drill tower : 24 phrases in 1 subject |
| Technology | 24 |