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There are many sorts of gears, and the most frequent classification approach is by equipment shaft. Normally, there are a few sorts of the parallel axis, cross-axis, and staggered axis. 1) Parallel shaft gears: like spur gears, helical gears, interior gears, racks, and helical racks, etc. 2) Cross shaft gears: straight bevel gears, spiral bevel gears, zero-diploma bevel gears, and so forth. 3) Staggered shaft gears: There are staggered shaft helical gears, worm gears, hypoid gears, and so forth.
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