Section XVIII — Optical, photographic, cinematographic, measuring, checking, precision, medical or surgical instruments and apparatus; clocks and watches; musical instruments; parts and accessories thereof
Chapter 90 — Optical, photographic, cinematographic, measuring, checking, precision, medical or surgical instruments and apparatus; parts and accessories thereof
Heading 9018 — Instruments and appliances used in medical, surgical, dental or veterinary sciences, including scintigraphic apparatus, other electromedical apparatus and sighttesting instruments.
National subdivision 9018.4 — Other instruments and appliances, used in dental sciences:
Subheading 9018.41 — Dental drill engines, whether or not combined on a single base with other dental equipment