chainless

The combination of the chain and chainless principles ensure the dimensional stability of the knitted fabric.

直辊与针板链相结合的结构设计保证了针织物的稳定性。

This is converted into electricity and can be fed directly to the motor giving a chainless bicycle but also to charge a battery.

是转换成电力，可直喂养的电机给链行车，而且充电电池。