鼠标是2层外壳，我原本的设计想法是做很多层次的，水流也想单独拆卸用来方便打印和做成多色，但由于技术水平有限，现在做成了2个可拆卸的外壳。请尽量用更低的速度来打印。

The mouse has a two-layer shell. My original design idea was to create multiple layers, and I wanted the water flow to be detachable for easier printing and multi-color production. However, due to limited technical skills, it is now made into two detachable shells. Please print it at the lowest possible speed.