 |
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| drilling bit teeth with prismatic working surface | |||
| bit teeth with prismatic working surface | |||
| зубья долота с призматической рабочей поверхностью: 1 phrase in 1 subject |
| Oilfields | 1 |
|
| |||
| drilling bit teeth with prismatic working surface | |||
| bit teeth with prismatic working surface | |||
| зубья долота с призматической рабочей поверхностью: 1 phrase in 1 subject |
| Oilfields | 1 |