| |||
test pits | |||
trial pit; test pit | |||
prospect pit | |||
open test pit | |||
prospect hole | |||
test trench; test-pit |
试坑 : 27 phrases in 7 subjects |
Automobiles | 1 |
Aviation | 1 |
Electric machinery | 2 |
Electronics | 1 |
Engineering geology | 1 |
Rail transport | 1 |
Technology | 20 |