bit feeding mechanism

常見例句

雙語例句

• Start collaring with reduced throttle to the impact mechanism and feeding, let the bit work its way slightly into the rock.
  開孔時(shí)，應(yīng)采用最小的沖擊和推進(jìn)力，使鉆頭平穩(wěn)地進(jìn)入巖層。
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