structure-contour
| method
| structure contour | |
| oil | 地下等高线; 构造等高线 |
| method | |
| gen. | 法; 标准; 水平 |
| environ. | 方法 |
| hydroel.st. од. | 方法 |
| mech. | 电火花法 |
| |||
| 地下等高线; 构造等高线 | |||
| 结构轮廊线 | |||
|
structure-contour : 9 phrases in 4 subjects |
| Engineering geology | 1 |
| Oil / petroleum | 4 |
| Space | 1 |
| Technology | 3 |