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Question:

What's the round hole on the chair, please?

What's the round hole on the chair, please?

Answer:

Just like a railroad track, there is a little space left between each section of the track, because the rail (metal) is heated and expands because of heat expansion and cold contraction. This gap is meant to give space to this expansion. Just because the track is deformed by temperature, the plastic chair is deformed because of the force.
Used in body exhaust (commonly known as farting), and used to drain water while scrubbing chairs.
Plastic is malleable, and when it sits under pressure, the plastic extends in all directions to accommodate the faint extension.
Plastic benches, stools, most have a small round hole, there is a scientific truth.

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