The bottom bracket axle is permanently mounted to the right hand crank and has splines for the left hand crank.

而中轴本身是和(安装大飞的)曲柄连为一体的。

youdao

The bottom bracket axle is permanently mounted to the right hand crank and has splines for the left hand crank.

而中轴本身是和(安装大飞的)曲柄连为一体的。

youdao