Weichai mainly engaged in the machine and its accessories, as well as diesel engine repair and maintenance.

主要经营的是潍柴整机及配件，以及柴油机的维修保养。

youdao

The blade tip crack of the high pressure turbine is repaired by using the laser welding, which can reduce effectively the repair cost and increase the economic effectiveness of the engine repair.

采用激光熔焊方法，修复了高压涡轮工作叶片叶尖裂纹，有效降低了发动机修理成本，提高了发动机修理的经济效益。

youdao

I had to dismantle the engine in order to repair it.

我得把发动机拆开来修理。

《牛津词典》

When John became interested in engine repair, he restored five vintage Rolls Royces.

FORBES: And Now for the Toughest Influence Challenge of All: Changing Myself

It bought British Airways' engine-repair centre in South Wales, and has turned this humble but essential trade into a nice little business.

ECONOMIST: Aircraft engines

The repair shop put an engine on a test bed, attached sensors, hooked it to computers, and tried every possible combination of gas and air.

FORBES: Institutional Stupidity, III