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It's that section is blocked, this phenomenon is fish bones, or toothpicks and straw sticks, etc., across the joints of the sewer pipes, and there are rags, wiping pot balls, etc.
Find a professional dredger, otherwise buy a simple dredge yourself, a few yuan, and dredge it yourself.
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If it's just your family blocked, then go to the grocery store near the vegetable market to buy a spring steel ribbon hand crank handle (length of 6 meters, 8 meters, 10 meters) 10-20 yuan, it is very convenient to use, and my sewer is treated with it.
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You go to the property and let them settle it. He collects the property fee to serve the owner. /
If the toilet is clogged, you can't use nitric acid! It will corrode and leak the sewer pipes! It is possible to use a dredging machine.
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