Subject: design for an up-hole... dril. Помогите перевести первое предложение со словом up-holeIt is generally recommended that you design for an up-hole between 1,600 and 2,700 m/min. If the rock is low in density or the cuttings are small you can be in the low end of the range... Higher up-hole velocities may be required in bad, fractured ground with voids or caverns, when drill very deep holes, or if there is a lot of water in the ground. |
общая рекомендация выполнять замеры при ПОДЪЕМЕ (прибора) ВВЕРХ ПО СКВАЖИНЕ |
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