| 摘要 |
The auger drill machine includes a motor; a gear mounting unit for dividing the power from the motor and driving the first and the second hollow shafts separately; a wall excavation mounting unit for receiving the power from the second hollow shaft and excavating the groove, in the form of "+"; and a perforation mounting unit for receiving the first and the second hollow shafts and excavating the hole for a column of the cut-off wall.
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