lc = 0.06;
lc2 = 3;
rayon = 0.6;
rayon2 = 12;
Point(1) = {rayon,0.0,0.0,lc};
Point(2) = {0.0,0.0,0.0,lc};
Point(3) = {-rayon,0.0,0.0,lc};
Point(4) = {-0.0,rayon,0.0,lc};
Point(5) = {-0.0,-rayon,0.0,lc};
Circle(1) = {5,2,1};
Circle(2) = {1,2,4};
Circle(3) = {4,2,3};
Circle(4) = {3,2,5};
Line Loop(5) = {2,3,4,1};
Plane Surface(6) = {5};

Extrude Surface {6, {0,0,rayon}}{ 
  Layers { 10  ,{1.}}; 
}; 
 

Point(11) = {rayon2,0.0,0.0,lc2};
Point(12) = {-rayon2,0.0,0.0,lc2};
Point(19) = {-0.0,rayon2,0.0,lc2};
Point(14) = {-0.0,-rayon2,0.0,lc2};
Point(15) = {rayon2,0.0,0.6,lc2};
Point(16) = {-rayon2,0.0,0.6,lc2};
Point(17) = {-0.0,rayon2,0.6,lc2};
Point(20) = {-0.0,-rayon2,0.6,lc2};
Circle(29) = {15,7,20};
Circle(30) = {20,7,16};
Circle(31) = {16,7,17};
Circle(32) = {17,7,15};
Circle(33) = {14,2,11};
Circle(34) = {11,2,19};
Circle(35) = {19,2,12};
Circle(36) = {12,2,14};
Line(37) = {15,11};
Line(38) = {17,19};
Line(39) = {20,14};
Line(40) = {12,16};
Line Loop(41) = {30,31,32,29};
Line Loop(42) = {9,10,11,8};
Plane Surface(43) = {41,42};
Line Loop(44) = {34,35,36,33};
Plane Surface(45) = {44,5};
Line Loop(46) = {32,37,34,-38};
Ruled Surface(47) = {46};
Line Loop(48) = {33,-37,29,39};
Ruled Surface(49) = {48};
Line Loop(50) = {36,-39,30,-40};
Ruled Surface(51) = {50};
Line Loop(52) = {35,40,31,38};
Ruled Surface(53) = {52};
Surface Loop(54) = {43,51,45,47,49,53,27,15,19,23};
Volume(55) = {54};
Physical Surface(56) = {43,45,28,6};
Physical Volume(57) = {1,55};
Physical Surface(58) = {47,53,51,49};
