sewing clip
缝纫夹
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The former was sewing buttoning, mainly by needle swings around, The latter is needle only fluctuation movement, and by Newcastle clip swinging.
前者在缝钉纽扣时，主要由机针左右摆动；后者是机针仅上下运动，而由纽夹左右摆动。
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模块上移
模块下移
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