Is the maintenance by a systematic preventative maintenance system?

保养维护是否有系统的预防性维护机制？

youdao

Is the maintenance by a systematic preventative maintenance system?

你们是否建立了预防性的维护程序？

youdao

Is the maintenance by a systematic preventative maintenance system?

你们是否建立了预防性的维护程序？

youdao