Cost of Permanent Repairs是什么意思

用法例句

In this circumstance, We can use the method that repair the pipe's leaky crack quick and permanent repair.

本文简要介绍化工厂地下环形供水管网裂漏,在裂漏点前后阀门关闭不严,阀门以外管网又需保证正常供水压力的情况下而进行的快速永久性修复。