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spine model, spine model, ct, scan, with, contrast, .stl, 3d, model, printable, printing, medical, medicine, septum, auricle, ventricle, bronchi, ribs, lung, mediastinum, muscle, aorta, right, left, arch, pulmonary, dorsal, medulla, bone, joint, intercostal, chest, scapula, clavicle, diaphysis, epiphysis, cardiomegaly, stomach,