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。
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.
相对较短的四肢、用于抓握的手部、对生木质、铲形前齿、方形臼齿和带有指甲指头而不是爪子，这些都是艾达化石的典型特征。
Her features include relatively short limbs, grasping hands, opposable thumbs, shovel-like front teeth, square molars, and digits with nails rather than claws.
提出一种基于复合形法的液压挖掘机铲斗机构的优化设计方法，给出优化模型。
A method of optimal design for Hydraulic Excavator shovel mechanism is discussed and the optimal model is given.
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