"Optical insertion " CNS Standards List| Method test | Method test | Bleaching powder | Proficiency testing | Graphical Symbols | Sealing reagent | Tolerance Whitworth | Information technology | |
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CNS 14339
2017 Edition Optical insertion loss meter 光插入損失計 |
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CNS 14339
1999 Edition Optical insertion loss meter 光插入損失計 |
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