We have just done our first underwater repair, having found a piece of timber had broken.
我们刚完成了第一次水下维修，发现有一个水管已经破裂了。
2
You cannot easily repair a piece of wood cut to the wrong dimensions.
你不能轻易修复切一块木头到错误的尺寸。
3
By using manual arc welding to repair the big kiln circle, the welding process of ZG310-570 super thick cast steel piece was a success, with good running effect observed for more than 5 years.