mesh转solid freecad

 FreeCAD_简单的STL转可编辑step实体文件_哔哩哔哩_bilibili

拖到body底下

obj mesh数据转solid

# Created by FreeCAD <https://www.freecad.org>
v 20.747145 10.413447 0.000000
v 8.346498 10.413447 0.000000
v 20.747145 10.413447 10.000000
v 8.346498 10.413447 10.000000
v 8.346498 -8.346489 0.000000
v 8.346498 -8.346489 10.000000
v -22.814070 -8.346489 0.000000
v -22.814070 -8.346489 10.000000
v -22.814070 -24.244740 0.000000
v -22.814070 -24.244740 10.000000
v 20.747145 -24.244740 0.000000
v 20.747145 -24.244740 10.000000
vn 0.000000 1.000000 -0.000000
vn 0.000000 1.000000 0.000000
vn -1.000000 0.000000 0.000000
vn -1.000000 -0.000000 0.000000
vn 0.000000 1.000000 -0.000000
vn 0.000000 1.000000 0.000000
vn -1.000000 0.000000 0.000000
vn -1.000000 -0.000000 0.000000
vn 0.000000 -1.000000 0.000000
vn 0.000000 -1.000000 0.000000
vn 0.000000 0.000000 -1.000000
vn 0.000000 0.000000 -1.000000
vn 0.000000 0.000000 -1.000000
vn 0.000000 0.000000 -1.000000
vn 0.000000 0.000000 1.000000
vn 0.000000 0.000000 1.000000
vn 0.000000 0.000000 1.000000
vn 0.000000 0.000000 1.000000
vn 1.000000 0.000000 0.000000
vn 1.000000 -0.000000 0.000000
f 1//1 2//1 3//1
f 3//2 2//2 4//2
f 2//3 5//3 4//3
f 4//4 5//4 6//4
f 5//5 7//5 6//5
f 6//6 7//6 8//6
f 7//7 9//7 8//7
f 8//8 9//8 10//8
f 9//9 11//9 10//9
f 10//10 11//10 12//10
f 9//11 5//11 11//11
f 7//12 5//12 9//12
f 2//13 1//13 5//13
f 5//14 1//14 11//14
f 6//15 10//15 12//15
f 6//16 8//16 10//16
f 3//17 4//17 6//17
f 3//18 6//18 12//18
f 12//19 11//19 1//19
f 12//20 1//20 3//20