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GB 4706.74-2004/IEC 60335-2-28:1994
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Safety of househould and similar electrical appliances-
Particular requirements for sewing machines
(IEC 60335-2-28:1994,IDT)
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GB 4706.74-200
GB 4706.74-2004 家用和类似用途电器的安全 缝纫机的特殊要求.pdf