special overhauls

• 大修

special overhauls的用法和样例：

例句

1. The whole machine clearing in engineering overhauls is still a technical problem.
   工程机械大修时的整机清洗是国内尚未解决的技术难题。
2. For overhauls, the bogie may be removed to a special area where it is placed on stands for stripping and refitting work.
   大修时，转向架要被移到转向架车间，那里有许多支架用于拆卸和重新组装转向架。