折叠式井架 | |
dril. | cantilever derrick; cantilever mast; folding derrick; jack knife derrick; jackknife mast; sectionalized derrick |
外侧 | |
eng.geol. | case; outboard |
gymn. | outer side |
二层台 | |
oil | racking board |
| |||
cantilever derrick; cantilever mast; folding derrick; jack knife derrick; jackknife mast; sectionalized derrick | |||
jackknife derrick |
折叠式井架 : 11 phrases in 2 subjects |
Drilling | 8 |
Oil / petroleum | 3 |