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CNS 9939 Standard english version introduction

CNS General No. CNS 9939
Classified No. Z9068
Method of test for knoop hardness of optical glasses
光學玻璃諾布氏硬度試驗法
Date of Approval
Bureau of Standards, Metrology and Inspection Date of Revision
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CNS Standard Code CNS 9939
CNS Standard Classified No. Z9068
CNS Standard English Title Method of test for knoop hardness of optical glasses
CNS Standard Chinese Title 光學玻璃諾布氏硬度試驗法
CNS Standard Edition 07/15/2022
CNS Standard Pages 0
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