"Optical Flats " CNS Standards List| Copper alloy | Method test | Limit Gages | Entity Authentication | Methods Testing | Transitionary Size | Prosthetics orthotics | Method test | |
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CNS 10490
2022 Edition Optical Flats 光學平板 |
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CNS 10490
2017 Edition Optical Flats 光學平板 |
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