In jumping from the wire to the workpiece, the sparks erode away a clear defined path, which can be very closely controlled with NC.

The slopes of volcanoes such as Kilauea become steep and vulnerable to this kind of collapse when the lava from repeated eruptions builds them up more rapidly than they can erode away.

The river of our life, worrys, nervous, stresses, it looks like spray and wave in the river to erode our soul. we need to throw them away form our life, so many people like to talk with their friend.