Add fine adjust device for the pressure of foot, without dial on the adjustable screw, more convenience for operation.

压脚压力采用微调装置，压力调节螺钉设有刻度，更加方便操作。

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The top dial typed presser foot regulator together with presser foot lever assures easier operation;

机顶圆盘式交互压脚，调节旋钮和机身正面压脚提升板手，使操作调节轻松简便；

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