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4、s for residual current operated protective devices) 60974-1:2005 . 1. (IEC 60974-1:2005 Arc welding equipment Part 1: Welding power sources1) 60974-4 . 4. (IEC 60974-4 Arc welding equipment Part 4: Periodic inspection and testing) 60974-6 . 6. (IEC 60974-6 Arc welding equipment Part 6: Limited duty
5、manual metal arc welding power sources) 60974-10 . 10. IEC 60974-10 Arc welding equipment Part 10: Electromagnetic compatibility (EMC) requirements 1 IEC 60974-1:2012 . 1. (Arc welding equipment Part 1: Welding power sources). , , . 60974-9201 4 2 60974-11 . 11: (IEC 60974-11 Arc welding equipment P
6、art 11: Electrode holders) 60974-12 . 12. (IEC 60974-12 Arc welding equipment Part 12: Coupling devices for welding cables) 3 : 3.1 (welding circuit): , , . 1 . 2 . . 60974-1:2005, 3.11 3.2 (extraneous conductive part): , , , . . 3.3 (workpiece): , . 3.4 (protective clothing and accessories): (, , ,
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