Geometry model of roller bit's sphere tooth, wedgy tooth and bucket shape tooth were established;
建立了牙轮钻头的球形齿、楔形齿和勺形齿三维空间的几何模型；
Because the closestool body is of a bucket shape, the utility model has low cost and simple manufacture method.
本实用新型由于马桶体是一个水桶形，具有造价低、制造方法简单。
Based on an analysis on the variation of cutting edge length of symmetrically shaped bucket in slewing conditions, a non-symmetrical bucket shape is presented.
本文在分析对称形铲斗回转时切削刃长度变化的基础上，提出一种非对称铲斗斗形。
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