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方便订书机 / Convenience stapler


Bump a baffle in the stapler, can control
the book into the distance of the stapler,
ensure the stitching needle in a row of neat
Transparent shell material and is
convenient to see the internal stitching needle number


Chengdu University of Technology

Chengdu University of Technology
Chengdu, China

WenTing Liu,
Chengdu University of Technology