This article analyzes the overhaul process for the wheel motor of GE788 model electrical truck adopted by the mining site of Dexing Copper Mine of JCC.

Based on the difference dyeing properties of wool and polyester fibers,rehandling process of polyester/wool blended fabric was discussed.

This paper introduces the damage situation and repair technology of the column and jack of hydraulic support.

Casing shapes and its workover technique for Casing Damage Wells;

Via analysis of the repair technology for cracking in the side frames in field, several testing combinations are made from the tools applied for making groove at the cracking, welding rod applied in welding, selection of the tempering temperatures.