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The original is not easy to buy. Those who sell sanitary ware have toilet seats for sale, and they cost dozens of yuan a set.
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There are Taobao on it, and some things are universal. Measure the size.
Required beam dismantling material: toilet seat with a set of accessories (including a pair of toilet seats, 2 screws, 2 square tenons, 2 sets of nuts). >>>More
Is it an electronic toilet seat or a regular one?
As you described, your house is all-inclusive. The screws are in the back. If the toilet is too close to the wall and you can't get in, you need to remove the toilet and replace it.
Slow two, if it is broken, there are two screws under the toilet seat, and you can replace the new toilet seat by screwing the screws.
Toilets are sold everywhere you buy. There are expensive and cheap ones, and the landlord can go and see them.