 |
| |||
| pig injection and receiver valve system (для чистки трубопровода) | |||
| pig injector and receiver valve system (для чистки трубопровода) | |||
| pig injector and receiver valve system | |||
| шлюзовой затвор запуска и приёма скребков: 3 phrases in 3 subjects |
| Oil / petroleum | 1 |
| Oil and gas | 1 |
| Oilfields | 1 |