lowering in tractor
... lowering in crew 下沟队 lowering in tractor 下沟拖拉机 The Study on Lowering Production Cost in Mawan Power Plant 妈湾电厂降低生产成本研究 ...
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管子下入管沟后，由侧铲推土机或装有回填附件的拖拉机回填管沟。
Backfilling the trench following the lowering-in of the pipe is carried out by angledozers or backfilling attachments to tractors.
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