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US4519330A Sewing needle with two portion shank 失效
双针缝纫针

Sewing needle with two portion shank
摘要:
A needle for use in a sewing machine having a one-way needle clamp, in which the needle is formed with a shank having a minor portion adjacent the free extremity which cooperates with the one-way needle clamp to properly orient the sewing needle, and a major portion extending between the minor portion and the blade which includes a reference surface for locating the blade with respect to the sewing machine looptaker.
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