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See Chinese contents: JB/T 9050.1-1999 JB/T 9050.1-1999: General technical requirement of reduction cylindrical gear units
This Standard specifies the general technical conditions for cylindrical gear reducers. This Standard applies to single-stage, two-stage and three-stage cylindrical gear reducers (hereinafter referred to as reducers) with a center distance of low-speed stage ????1000mm, and also applies to single-stage, two-stage and three-stage planetary gear reducer (hereinafter referred to as reducer) with low-speed turret radius R??300mm.
