常見(jiàn)例句雙語(yǔ)例句Start collaring with reduced throttle to the impact mechanism and feeding, let the bit work its way slightly into the rock.開(kāi)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。 返回 bit feeding mechanism