用于替换邮箱门打开时的默认提示标志。

如果你想修改模型，可以访问免费的 OnShape 链接进行操作。

OnShape:https://cad.onshape.com/documents/e2505c475234edceecdd81c4/w/df53b840196bc3486d583b40/e/bb1dd8e7a72564817ecf8358?renderMode=0&uiState=65be9ebc430e5650ecd43ace

邮箱:https://www.amazon.com/gp/product/B01KJEFJ4I/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1