needle shaft

例句：

1. 1. The needle shaft is the part of the sewing machine that holds the needle in place.
   针杆是缝纫机中固定针的部分。
2. 2. The spindle of the wheel is made of a solid rod.
   轮子的主轴是由一根实心棒制成的。
3. 3.The shaft of the drill is where the motor is mounted.
   钻机的轴上安装有电机。