 |
| |||
| California sampler; piston sampler | |||
| |||
| piston-type core sampler; piston sampler | |||
| 活塞取样器: 14 phrases in 4 subjects |
| Engineering geology | 5 |
| Hydroelectric power stations | 1 |
| Oil / petroleum | 1 |
| Technology | 7 |
|
| |||
| California sampler; piston sampler | |||
| |||
| piston-type core sampler; piston sampler | |||
| 活塞取样器: 14 phrases in 4 subjects |
| Engineering geology | 5 |
| Hydroelectric power stations | 1 |
| Oil / petroleum | 1 |
| Technology | 7 |