Traditional Culture Encyclopedia - Traditional stories - Why is there a round hole in the middle of the plastic stool? Why not a square hole? Why not make more holes?
Why is there a round hole in the middle of the plastic stool? Why not a square hole? Why not make more holes?
This stool design can be stacked one by one, which is convenient for storage and transportation. If holes are not made, a closed space may be formed on the upper part of the stacked stools, and the air pressure difference will suck the two stacked stools together tightly and cannot be separated.
As long as there is a drill bit, it is more convenient to drill round holes than to drill holes of any shape. One hole is enough.
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