screw throw 中文意思是什麼
screw throw
解釋
擰轉推球-
Feed throw - out screw : whether in embroidering or plan sewing, the fabric feed can be regulated to sew fabrics of different thickness by simply adjusting the feed throw out screw
針距選擇及倒縫:調節針距,只用轉松固定螺釘,發動指示桿,即可縫紉不同疏密的針距或倒縫。
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