pipeline crossing
| engineering
| pipeline crossing | |
| oil | 管道穿越 |
| engineering | |
| avia. | 研制部门; 设计和研制 |
| desert. | 工程 |
| econ. | 工程学 |
| met. | 工程; 设计; 技术; 工艺; 操纵技术 |
| space | 工程 技术 |
| |||
| 管道穿越 | |||
|
pipeline crossing : 9 phrases in 3 subjects |
| Oil / petroleum | 7 |
| Rail transport | 1 |
| Technology | 1 |