引用第4楼jackyhu68于2011-06-29 10:56发表的 :
25 Expelled parts
25.1 Where expelled parts could constitute a SAFETY HAZARD protective means shall be provided.
Compliance is checked by inspection for the presence of protective means.
25.2 A graphical display vacuum tube whose maximum face dimension exceeds 16 cm shall either be intrinsically safe with respect to effects of implosion and to mechanical impact, or the ENCLOSURE of the
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