听说做的时候也是比较简单,就是在一头打个洞下去,那个机器把新管从旧管里面推过去,不要挖沟的。
https://pipelt.com/services/trenchless-sewer-pipe-repair/
听说做的时候也是比较简单,就是在一头打个洞下去,那个机器把新管从旧管里面推过去,不要挖沟的。
https://pipelt.com/services/trenchless-sewer-pipe-repair/
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