Crank Removal and Installation - Three Piece Crankset自行车曲柄拆装——三件式

https://www.youtube.com/watch?v=cPQyQnNdews&list=PLGCTGpvdT04SdAP5vThZlOInVsJ891lm4&index=4
Park Tool讲解三件式自行车曲柄拆装方法