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How can it be installed, it must be more than 420, and it is just put down after pasting the tiles. It is best to leave a small slit at 430 or above, so as not to be crowded.
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Definitely not, and it's recommended to leave some room for affluence.
The back drainage and side drainage can be done, but the lower drainage is too far, the drainage will not be smooth, and it is easy to block.
50 centimeters, then it is not the side of the toilet, but the city wall.
Yes, but the drainage may be slower. There is also a large water outlet of the toilet, so you have to buy large and small shrinkage joints to install the toilet.
It's not easy to change, the standard size of the cabinet is 600, if you make a cabinet horizontally, people can't stand, and if you make a cabinet vertically, it's too short, you can only do 80
Yes, there are two holes under the toilet, which can be checked on Taobao, I have seen it.