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This needle cancell the traditional pinhole.Instead the opened at the end of the needle groove.In order to make it easier for thread the needle.
Groove design inspiration comes from the dishhook.And in using your cases in the direction of the tip.The good line to get thread.Material is the metal.This can ensure that its hardness and toughness.
Berijing Institute of Technology,Zhuhai
Zhuhai, China
Weihua Lee,
Berijing Institute of Technology,Zhuhai