Judging from the fact that the other scouts haven't arrived, Judging from the fact that the other scouts haven't arrived, they__________the b 分类:中医医师 题型:单选题 查看答案
已知一蜗杆传动,蜗杆头数k=2,转速n1=1450r/min,蜗轮齿数z=62,求蜗轮转速。 已知一蜗杆传动,蜗杆头数k=2,转速n1=1450r/min,蜗轮齿数z=62,求蜗轮转速。 分类:中医医师 题型:单选题 查看答案