Invention of nailing artifacts, nailing 200 flat per day, cost less than 500 yuan

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Life Invention of nailing artifacts, nailing 200 flat per day, cost less than 500 yuan
2019-05-17 11:50:37 ·
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Invention of "nailing" artifact, fast nailing, the whole nailing process, can be completed without bending down.
Tags：Nailing artifacts, scientific and technological inventions, mechanical inventions
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