The bolt fastening metal structure of tower crane and pin structure without deformation, no weld crack.
塔吊的紧固金属结构的联接螺栓和销轴，结构件不得有变形，焊缝不得有裂纹。
2
The methods and the program can be used to guide the choice of milling cutter when processing the inner curve of pin gear housing in double crack three ring-plate cycloid reducer.