半顶角示意图 圆锥面的截面是个等腰三角形，这个等腰三角形的顶角的角平分线将顶角分成两个相等的角，这两个角就叫做圆锥面的半顶角。
料斗半顶角由实际物料和料斗材料确定。
The half vertex angle was determined by particulate solid and hopper materials.
结果表明，半顶角对制件厚度变化起主导作用，其值越小，厚度减薄越严重；
The results show that half-apex angle has a great effect on sheet thickness distribution, the smaller the half-apex angle is, the bigger the sheet thickness thins;
指出在一定半顶角下设计的“标准”整体流料仓，只适用于很小一部分粉体物料。
The'standard' massive flow silos designed with certain half vertex angle was only suitable for a little part of particulate solid.
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