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发明的目的本发明,是把在蒸镀熔融金属时所使用的真空镀用坩埚表层通过改性处理,制成使用寿命长的蒸镀用石墨坩埚.
OBJECT OF THE INVENTION In the present invention, a surface of a crucible for vacuum plating used for vapor deposition of a molten metal is modified to give a graphite crucible for evaporation having a long service life.