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This designed needle is different from the traditional one. At the bottom of the needle is made of the metal with a memory function. People push the needle down, upon placing the bottom on the desktop, to largen the pinhole, which allows users to thread the needle easily. After you make it, stop pressing it,the needle recover the same prototype as the traditional needle.
Xihua University
Room 107,Building A of No. 11 Apart
Chengdu,Sichuan, China
Xihua University
Room 107,Building A of No. 11 Apart
Chengdu,Sichuan, China
Xinran Zhou. Min Liu .Yue Liu.