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公开(公告)号：US1896575A
公开(公告)日：1933-02-07
申请号：US16547927
申请日：1927-02-02
Applicant: DIAMOND POWER SPECIALITY
Inventor： COX SAMUEL F , ROBERTSON JOHN H
IPC: F28G3/16
CPC classification number: F28G3/166
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