Connecting rod feeding mechanism, needle bar basting, looper hooking form parallel chain-stitch, which the sti tch is firmelastic.

 
  • 連桿式送料機構,針桿挑線(xiàn)、彎針勾線(xiàn)形成雙線(xiàn)鏈式線(xiàn)跡,線(xiàn)跡牢固且富有彈性。
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