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colver thumbtack / colver thumbtack

colver thumbtack
colver thumbtack

During our daily life, it is very convenient for us to use thumbtack, but there is a problem that we can’t pull out the thumbtack easily. Therefore, I design the rotating thumbtack, and we can pull out them easily by rotating them. What‘more, it looks like a clover, so I name it as Clover Thumbtack.

University

Harbin Engneering University

Harbin Engneering University
HARBIN, China

Yuan Ningbo,
Harbin Engneering University