| |||
sand mark | |||
sand hole | |||
dirthole | |||
pit | |||
| |||
pit |
砂孔: 72 phrases in 13 subjects |
Architecture | 3 |
Automobiles | 1 |
Compressors | 3 |
Drilling | 4 |
Electronics | 2 |
Engineering geology | 3 |
General | 3 |
Geophysics | 6 |
Latin | 1 |
Metallurgy | 3 |
Nautical | 1 |
Oil / petroleum | 9 |
Technology | 33 |