特殊用法gear backlash1.齿隙, 齿轮侧隙, 回差gear-to-pinion backlash1.主动齿轮与被动齿轮间的节圆间隙radial top backlash1.径向间(顶)隙tolerable backlash1.容许齿隙, 容许反跳total backlash1.总间隙, 总游隙; 总齿隙, 总反跳