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The design is added to the head of a toothpaste, toothpaste
sets, sets the shape of the mouth of the toothpaste is flat,
so the extruded toothpaste is flat, the squeeze on the brush
is not easy to drop, and thus solve the problem.
Shandong University of Science and Technology
qingdao, China
JIlu Wang,
Shandong University of Science and Technology
Renhai Wang,
Shandong University of Science and Technology
