Rigid hammer, convenient usage and maintenance.

锤头耐磨耐冲击，使用和维护方便。

youdao

Want to master the right usage and maintenance of the projector and other equipments.

要学会投影机及其他设备的正确使用与维护。

youdao

Then discusses the load of UPS and suggests some ways in usage and maintenance of UPS.

最后讨论了UPS的负载问题，提出了UPS的一些使用、维护方法。

youdao

Gathering data from several of Cisco's test customers, he found that the cost to operate the router is a fifth to a half the combined energy usage and maintenance costs of the hardware that hosts the same services.

FORBES: Cisco Seeks An Edge