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International Standard Category: Copper and copper alloys

GB/T 20509-2006    Copper and copper alloys drawing stock for the contacting materials of electric locomotives
电力机车接触材料用铜及铜合金线坯 ;
Category No.:77.120.30 Valid Status:superseded
Issued Organization:AQSIQ, SAC Issued Date:2006-09-26
Implemented Date:2007-2-1 Abolished Date:
Superseded Standard.:GB/T 20509-2023
Superseded Date:2023-12-1
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