$fn=50;
translate([0,33/2-17.1/2,0]) cylinder(d=17.1, h = 22);

translate([0,-33/2+10.1/2,0]) cylinder(d=10.1, h=22);
translate([-10.1/2,-33/2+10.1/2,0]) cube([10.1, 20,22]);

cube([25, 40, 1], center = true);