HS Code Subheading 903190

9031.90.20 Parts and accessories of profile projectors 9031.90.45 Bases and frames for the optical coordinate-measuring machines of subheading 9031.49.40 9031.90.54 Parts & accessories of measuring & checking optical instruments & appliances of subheading 9031.41 or 9031.49.70 9031.90.58 Parts & accessories of measuring & checking optical instruments & appliances, other than test benches or profile projectors, nesoi 9031.90.70 Parts and accessories of articles of subheading 9031.80.40 9031.90.90 Parts and accessories of measuring or checking instruments, appliances and machines, nesoi