It's like having a gear factory on-line that can create spur, bevel, internal, rackgear and roller chain sprockets from your data input.
这就像一个齿轮厂上线，可以创造刺激，锥，内部，机架齿轮和滚子链的链轮从您的数据输入。
2
Some domestic textbooks only give proofs under special condition of rack cutters and proofs under general condition of gear cutter are not strict enough.
Some cars have variable-ratio steering, which uses a rack-and-pinion gear set that has a different tooth pitch (number of teeth per inch) in the center than it has on the outside.