切丝机上下排链是由油马达驱动（），再通过链轮、链条以及齿轮把动力传到排链辊轮上从而运转的。
参考答案：PIV变速箱
. _______, he always tries his best to complete it one time.
A However the task is hard B However hard the task is
C Though hard the task is D Though hard is the task
供求平衡是指( )处于基本平衡状态。
A．总供给与总需求在价值总量方面B．供给方与需求方所能接受的价格C．供给和需求在时间和空间D．总供给和总需求的变动
