长沙罗茨鼓风机在检修的时候凡使用过的零件，拆下来检查，不外乎以下几种情况：一是质量状况尚好，或者虽有磨损但不作修理也可以继续使用；二是存在缺陷，但经过修复仍然可以继续使用；三是有较大的缺陷，难以修复或修理价值不大，需要进行更换。

In the inspection process, the parts that should be repaired and replaced should be repaired and replaced in a timely manner, otherwise the inspection quality of the blower will be affected. However, if there is no impact on the parts of the blind repair, or would have been able to continue to use the parts in advance of the replacement, but also will cause waste, increase maintenance costs. Therefore, to determine whether to repair and replace parts, in general, should follow the “necessary to repair and replace” principle.

Whether or not a part that can be repaired must be repaired rather than replaced should also be compared to the economics of repair versus replacement. This comparison is not just a comparison of the repair versus replacement cost of the part, but weighs the cost of the repair against the useful life of the repair.