HS 90.31 — Measuring or checking instruments, appliances and machines, n.e.c. or included in this chapter; profile projectors

90.31.10

Machines; for balancing mechanical parts

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90.31.20

Test benches

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90.31.41

Optical instruments and appliances; for inspecting semiconductor wafers or devices or for inspecting photomasks or reticles used in manufacturing semiconductor devices, n.e.c. in chapter 90

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90.31.49

Optical instruments and appliances; for measuring or checking, n.e.c. in chapter 90

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90.31.80

Instruments, appliances and machines; for measuring or checking n.e.c. in chapter 90

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90.31.90

Instruments, appliances and machines; parts and accessories for those measuring or checking devices of heading no. 9031

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