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公开(公告)号：US1928880A
公开(公告)日：1933-10-03
申请号：US45375830
申请日：1930-05-19
Applicant: DIAMOND POWER SPECIALITY
Inventor： COOLING LOUIS F , COX SAMUEL F
IPC: F28G3/16
CPC classification number: F28G3/166
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