For standard adjustment, the top end of the needle eyelet aligns with throat plate surface 2 when needle 1 descends and also presser foot 3 descends, and when the presser foot aligns with throat plate surface 2.

• 标准的中压脚和机针的调整位置是，中压脚3 和机针1一起下降，中压脚3 与针板上面2对齐之后，针孔上端与针板上面2 对齐的状态。