免费维修的英文：
maintenance free

参考例句：

"As many repairs as you need, free of charge"
随时免费维修

Warranty Service that are free-of-charge must meet the following criteria
免费维修:(须完全符合下列条件)

maintenance是什么意思：
n. 维持，保持；维修，保养；抚养；生活费

MAINT [maintenance]
维护| 保养

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？

The maintenance of free trade is correct.
主张自由贸易是正确的做法。

Maintenance work in progress sorry for the inconvenience

The maintenance of law and order is of vital importance.
法律与秩序的维持是至关重要的。

free是什么意思：
adj. 自由的；免费的；空闲的；任意的；免税的；游离的
adv. 免费地；自由地
v. 释放；免除；使自由，解放

Freedom is not free.
自由不是无偿的。

Be covered by free Medicare / be entitled to free medical care
享受公费医疗

It depends on free oxygen or air.
它依靠大量的氧或者空气。

He walked with a free gait.
他走路步态潇洒。

the free end of a flag
旗子未固定的一端