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CNS 4550 Standard english version introduction

CNS General No. CNS 4550
Classified No. B2284
Electric Lighting Fittings Screw Thread for Cover Glasses and Caps
玻璃螺紋(用於電器供玻璃護罩和帽蓋)
Date of Approval
Bureau of Standards, Metrology and Inspection Date of Revision
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CNS Standard Code CNS 4550
CNS Standard Classified No. B2284
CNS Standard English Title Electric Lighting Fittings Screw Thread for Cover Glasses and Caps
CNS Standard Chinese Title 玻璃螺紋(用於電器供玻璃護罩和帽蓋)
CNS Standard Edition 10/04/1978
CNS Standard Pages 1
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