开始过线时,其三角线架不能松0-90°为止,弯针最左边向右90度移动时,弯针线不能松,线构成三角架,防止弯针回转时的跳针,同时放出缝第一针所需的线。当90度线拉到最长时弯针线脱落,使弯针马上变松。弯针线开始松 ...
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