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。
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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