The bounds that be repaired in and heavies repair differentiates harder, reason normally will medium repair and overhaul puts a general designation together to be big in long.

• 小修则属局部修理,如栏杆整修或喷涂、步道整修、桥面补修、伸缩缝修理、护坡整修等。中修和大修的界限更难划分,故通常将中修和大修放在一起统称为大中修。