 |
| |||
| KB (kelly bushing) | |||
| kelly drive bushing (штангу) | |||
| kelly rotary bushing | |||
| RDB (rotary drive bushing); rotary drive bushing; kelly bushing (штангу andrushin) | |||
| вкладыш ротора под ведущую трубу: 10 phrases in 2 subjects |
| Oil / petroleum | 6 |
| Technology | 4 |
|
| |||
| KB (kelly bushing) | |||
| kelly drive bushing (штангу) | |||
| kelly rotary bushing | |||
| RDB (rotary drive bushing); rotary drive bushing; kelly bushing (штангу andrushin) | |||
| вкладыш ротора под ведущую трубу: 10 phrases in 2 subjects |
| Oil / petroleum | 6 |
| Technology | 4 |