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- translate([0,0,99])
- difference(){
- intersection(){
- difference(){
- sphere(106.0,$fn=150);
- translate([-200,-200,0])
- cube([400, 400, 400],center=false);
- }
- translate([-200,-200,-99.0])
- cube([400, 400, 400],center=false);
- }
- intersection(){
- sphere(100.0,$fn=150);
- translate([-200,-200,-93.0])
- cube([400, 400, 400],center=false);
- }
- }
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