At the grooving part the electric adjustable recessing tool apron move left and right and is synchronism with press-line wheel .

开槽部电动调整箱高、相位和开槽 刀 座左右移动，并与压线轮同步。

As the engagement of the unidirectional fasten piece and fasten rim negative direction rotation is avoided to locate the tool apron steadily to the sliding rail when cutting paper .

裁纸时，由于单向卡掣件和卡掣缘的配合，可以阻止 刀 座的逆向转动，从而使 刀 座可靠地定位于滑块 上。