spring type point lever

例句：

1. 1. The engineer used a spring-type point lever to adjust the tension in the cable.
   工程师使用弹簧式点杆杠杆来调整电缆的张力。
2. 2.The scientist discovered a new spring-type point lever that could be used for precise measurements.
   科学家发现了一种新的弹簧式点杆杠杆，可用于精确测量。
3. 3. The construction worker used a point-type lever to lift heavy objects from the ground.
   建筑工人使用点杆杠杆将重物从地面抬起。