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New built / Ointment

New built
New built

The new built-in needle lid can solve the problem. Twist the lid while using it, and then take away the red circle, screw up the lid finally. The height between needle and placket disappears, placket is broken by the needle, and the ointment can’t be polluted

University

Guangdong Industry Technical Colle

Guangdong Industry Technical Colle
Guangzhou, China

Hao Tao Chen,
Guangdong Industry Technical Colle