You need to go back and recheck the fast forward speed according to (Nmax/i)×(πD/1 000)=v to ensure that the fast forward speed also meets the requirements

You need to go back and recheck the fast forward speed according to (Nmax/i)×(πD/1 000)=v to ensure that the fast forward speed also meets the requirements. Usually the reduction ratio i and the number of gear teeth need to be adjusted together, which is also a method often used in our actual work. 

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