Calculates the tooth profile Angle of pinion cutters with the corrected formula of tooth profile Angle. However, under this condition, the tooth profiledesigning error is not smallest.
插齿刀的齿形角一般按齿形角修正公式来求，但此时的齿形设计误差不是最小。
2
In terms of the content, the research items include designing and testing six rows no-till wheat planter with whole profile modeling and include researching an opener of stagger double discs.
从内容上来看主要可分为六行整体仿形小麦免耕播种机的设计与试验研究和错开式双圆盘开沟器的探索研究。
3
To simplified the designing, diagram presentation, construction and profile of helicoidal stair, the formation of helicoid is analyzed, and it's mathematical model is studied.