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I think the restaurant has a hollowed-out bottom. You can make a board from the bottom of the bottom to make up for it.
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It can be remedied by adding another plate on top of the hollowed out.
The trick to quickly unclog the toilet bowl is very practical.
1.If conditions permit, replace the aluminum alloy cabinet feet with high point hail. >>>More
If you want to treat both the symptoms and the root causes, there are many ways to solve the problem. >>>More
Generally common method.
In many cases, even if the toilet is clogged, flush it more and it will pass. However, if it is so blocked, the consequences of your flushing will be even worse, and the whole bathroom floor will be black and yellow. >>>More
The trick to quickly unclog the toilet bowl is very practical.