Abstract: This paper introduces effect, structure and working principle of equipment making conveying belt change groove Angle.
文摘：介绍了试验台上输送带可变成槽装置的作用、结构及工作原理。
Meantime, the mathematical model of the groove Angle and the local dihedral is also deduced.
并且推导了局部两面角和坡口角数学模型。
Result: 36 cases of retroauricular groove flap through this surgery were survived, and reconstituted auricles had obvious skull-auricles Angle, the symmetry of reconstituted auricles were improved.
结果：36例耳后沟皮瓣均成活，再造耳有明显的颅耳角度，增强了与健耳的对称性。
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