short support jack

例句：

1. 1.The engineer used a short support jack to lift the heavy machine.
   工程师使用一个短支撑杆来抬起这台重型机器。
2. 2.The construction crew needed a short support jack to move the beam across the room.
   建筑工人需要用一个短支撑杆来移动梁穿过房间。
3. 3. The carpenter used a short support jack to adjust the angle of the roof.
   木匠使用一个短支撑杆来调整屋顶的角度。