螺旋桨是螺纹在轴上，而当安装之间的磁石的著磁，沉重的刀片将降至底部。
The propeller is threaded over the shaft, and when mounted between the magnets, the heavy blade will drop to the bottom.
由于采用上述结构，所以利用可收缩的螺纹将废弃的塑料瓶收拢，一个瓶的顶部与另一个瓶的底部相套在一起，达到节约空间的目的。
Adopting the structure, the contractile thread can be used to furl the waste plastic bottle. The top of the bottle is sleeved with the bottom of the other to save the space.
在坛盖上螺纹拄的底部，有一韧性垫圈。
A toughness cushion ring is arranged at the bottom of the threaded column on the jar lid.
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