完成齿轮计算，包括单个齿轮的跨棒距、变位系数和跨齿数计算、成对齿轮计算，渐开线计算，包含 几十种皮肤，可以设置开机启动，托盘隐藏-Completion of gear, including both the cross-bar from a single gear, variable coefficient and cross-tooth basis, the pair gear calculation, involute calculation, including dozens of kin