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Subject: applying hold back and pull down to gen. Может, кто поможет перевести -applying hold back and pull down to- Спасибо.An embodiment of the present invention provides a drill rig having a plurality of rams that can be selectively actuated to progressively increase the number of rams applying hold back and pull down to a drill head and associated drill bit rotated by the drill head in a manner where force is applied in balanced or symmetrical manner |
| извините, вопрос снимаю. |
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