Niu Ren invented a section of ordinary angle steel, the teacher took it to a processing, splicing welding is too convenient to use.

Home >Anecdote > Niu Ren invented a section of ordinary angle steel, the teacher took it to a processing, splicing welding is too convenient to use.

2019-09-30 09:30:09 Views Tags:Invention ,  Section ,  Ordinary ,  Angle Steel
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