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CNS 228 Standard english version introduction

CNS General No. CNS 228
Classified No. B3055
60° Center Drills,Straight Form with Conical Protective Chamfer
中心鑽(60°,去角直線錐形)
Date of Approval
Bureau of Standards, Metrology and Inspection Date of Revision
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CNS Standard Code CNS 228
CNS Standard Classified No. B3055
CNS Standard English Title 60° Center Drills,Straight Form with Conical Protective Chamfer
CNS Standard Chinese Title 中心鑽(60°,去角直線錐形)
CNS Standard Edition 01/03/1979
CNS Standard Pages 2
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