Helical worm gear reducer (power 0.12 ~ 22kw), helical bevel gear reducer (power 0.12 ~ 200kw), parallel shaft helical gear reducer (power 0.12 ~ 90kw), helical gear reducer (power 0.12 ~ 160kw) and machinery variable speed machine (power 0.18 ~ 7.5kw), cycloid needle wheel reducer, hard surface gear reducer