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1.发明授权Methods and arrangements for melting material which melts only with difficulty 失效用于熔化材料的方法和装置，其仅具有困难
公开(公告)号：US3436465A
公开(公告)日：1969-04-01
申请号：US3436465D
申请日：1965-11-17
Applicant: PHILIPS CORP
Inventor： RUITER JACOB WILLEM DE , WILLEMSTEIN ANTON
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