漏斗排沙方式利用螺旋流的分离机理来排除渠道泥沙； 平轴螺旋管流排沙是利用在管间加设导叶的方式产生螺旋流来输运泥沙。
The way of the sand funnel make use of separating mechanics of spiraling flow to breed out the sediment of the channel.
本文实地调研了冻结物冷藏间冷却排管的结霜速度和相应的霜层密度及影响结霜速度的主要因素。
The speed that frost forms on the surface of coil pipe in cold storage and the factors that mainly affect the frost forming speed is investigated here.
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