shaft helical spring

例句：

1. 1. The car's engine is located in the center of the engine block.
   汽车的发动机位于引擎缸体中心。
2. 2. The drill bit is a long shank that penetrates the wood.
   钻头是一个长柄，穿透木头。
3. 3. The machine tool has a solid shaft that supports its weight.
   这台机床有一个坚固的轴来支撑其重量。