extr press 中文意思是什麼
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Divide into four stitch back muscle ( take shape three muscle ), three stitch back muscle ( take shape two muscle ), two stitch back muscle ( take shape a muscle ), changing the difference of back muscle, only need to change different needle boards, press foot, it is extr - emely convenient to operate
其中分為四針背筋（成形三根筋） 、三針背筋（成形二根筋） 、二針背筋（成形一根筋） ，轉換背筋之分，只需更換不同的針板、壓腳即可，操作很是方便。
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