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 | 	multmatrix([[1, 0, 0, 0], [0, 1, 0, 40], [0, 0, 1, 0], [0, 0, 0, 1]]) {
		group() {
			hull() {
				multmatrix([[1, 0, 0, 15], [0, 1, 0, 10], [0, 0, 1, 0], [0, 0, 0, 1]]) {
					cylinder($fn = 0, $fa = 12, $fs = 1, h = 10, r1 = 1, r2 = 1, center = false);
				}
				difference() {
					cylinder($fn = 0, $fa = 12, $fs = 1, h = 10, r1 = 1, r2 = 1, center = false);
					cylinder($fn = 0, $fa = 12, $fs = 1, h = 5, r1 = 1, r2 = 1, center = false);
				}
			}
		}
	}
	multmatrix([[1, 0, 0, 40], [0, 1, 0, 40], [0, 0, 1, 0], [0, 0, 0, 1]]) {
		group() {
			hull() {
				multmatrix([[1, 0, 0, 15], [0, 1, 0, 10], [0, 0, 1, 0], [0, 0, 0, 1]]) {
					cylinder($fn = 0, $fa = 12, $fs = 1, h = 1, r1 = 10, r2 = 10, center = false);
				}
				cylinder($fn = 0, $fa = 12, $fs = 1, h = 1, r1 = 10, r2 = 10, center = false);
			}
		}
	}
	hull();
	hull();
 |