to make a new or wider hole in something, especially in a cylinder in an engine (= the tube-shaped device inside which the part that causes the fuel to produce power moves up and down)

The engine can be re-bored without taking it out of the vehicle. 发动机可以在不从车辆中拆下的情况下重新磨缸。

the act of making a new or wider hole in something, especially in a cylinder in an engine (= the tube-shaped device inside which the part that causes the fuel to produce power moves up and down)

When the engine was disassembled, it was found to need a rebore.

The gearbox was repaired and given a bearing change, including a re-bore. 变速箱进行了修理，更换了轴承，并进行了重新加工。

a gun that could not previously fire real bullets that has been changed so that it can

The weapon is advertised as a rebore, an imitation gun that has been adapted to fire. 该武器被宣传为加强枪，即经过改装能够发射子弹的仿制枪。