A cyclone flow generates in the blower duct (20) by the first air inflow hole (31) and the suction force of the blower box.
利用该第一空气流入孔(31)和上述吸气箱的吸引力，在吸气管道(20)内产生旋流。
This model can be used to predict the inflow profile of arbitrary lateral hole and the pressure distribution inner hole and around hole.
该模型能用于预测任意分支井的流入剖面和井筒内及井筒周围的压力分布。
The artificial hole piles are one of most foundation types in the modern construction, The problems on water inflow and soil flow are most troublesome in the construction of hole piles dug by man.
人工挖孔桩是现代建筑的主要基础类型之一，而涌水和流沙是人工控孔桩施工中最棘手的问题。
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