After your sewer lines are thoroughly inspected and hydro and/or mechanically cleaned, a high-tech, flexible, epoxy-saturated tube (liner) is installed directly into your existing drainage pipes. The epoxy cures (hardens) to form a new structural line – essentially creating a new pipe within the old pipe. It is completely sealed and free from all of the previous issues the original pipe contained.
我问你们没有机器挖吗，他避重就轻地说，机器也开不进来，开进来了院子也小。我是多大的机器，他说拖拉机那样吧。这人是不是在糊弄我？
这是trenchless pipe的技术，我看得似懂非懂，有懂的小伙伴不？是不是比挖坑便宜（肯定快了）。先谢谢各位。
https://pipelt.com/services/trenchless-sewer-pipe-repair/
After your sewer lines are thoroughly inspected and hydro and/or mechanically cleaned, a high-tech, flexible, epoxy-saturated tube (liner) is installed directly into your existing drainage pipes. The epoxy cures (hardens) to form a new structural line – essentially creating a new pipe within the old pipe. It is completely sealed and free from all of the previous issues the original pipe contained.
那由树脂做的这一段管子也不能用蛇呀。
一万五太贵了。人家六千搞定？
一般sewer line，是哪坏修那。全放树脂管是修在房子内部的管路，比起拆房树脂管还是便宜。
hydrojet clean sewer line may be needed
https://bbs.wenxuecity.com/tzlc/1577118.html