In view of the shortcoming of sand washing technology with recycled water, the negative-pressure sand fishing technology is put forward.
针对循环水冲砂工艺存在的不足，提出了负压捞砂工艺技术。
After thermal washing technology with large displacement is implemented, central thermal washing method is used to implement professional management in Xingbei development area.
实施大排量热洗技术后，杏北开发区采取集中热洗的方法，实行专业化管理。
After thermal washing technology with large displacement is implemented, central thermal washing method is used to implement professional management in Xingbei development area.
实施大排量热洗技术后，杏北开发区采取集中热洗的方法，实行专业化管理。
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