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Trains are like this, in order to save space, Dora alone will charge more than one person's money.
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Inside is a vacuum toilet, and when you press the flush button, you will suck up the excrement.
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I went to the toilet, but I didn't dare to be large, the large one must be blocked, and the mouth is too small.
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How nice, all-metal
The train toilets are straight to the ground, and the use of the toilet when you are close to the station will not make the station smell. >>>More
That's because there are more train station staff, more passengers, and feces excreted by people on the train. >>>More
Prevent odors from escaping from sewer pipes. Due to the curved structure of the pipeline, there will be some water in it that cannot be discharged, forming a "water seal", and the odor in the sewer pipe will not be emitted. >>>More
Public toilets are accessible to everyone! It doesn't mean it's free! The charge is because there are too many people who go, and it costs water and labor to clean up.
The feed and discharge system can be shared, saving costs. >>>More