1. This abrasion-inactive zone (2) can be reutilized after the abrasive wheel has been used.

2. So, among all of us, we must decide to regenerate, reutilize, desalinate and save to have more water.

3. The USB memory device according to the present invention may reutilize conventional substrate units and substrate accommodating units even when the housing and the cover unit coupled to the housing have a variety of shapes.