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咨询: HGJ 223-1992 铜及铜合金焊接及钎焊.技术规程 Technical specification for welding copper and copper alloys 电话:400 810 0369(当地市话费) ; MSN & E-mail:zxd711020@hotmail.com gbstandard@hotmail.com chinastandard@hotmail.com ; QQ: | |||||||||||
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咨询: HGJ 223-1992 铜及铜合金焊接及钎焊.技术规程 Technical specification for welding copper and copper alloys 电话:400 810 0369(当地市话费) ; MSN & E-mail:zxd711020@hotmail.com gbstandard@hotmail.com chinastandard@hotmail.com ; QQ: |
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