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公开(公告)号：US1877721A
公开(公告)日：1932-09-13
申请号：US64766723
申请日：1923-06-25
Applicant: DIAMOND POWER SPECIALITY
Inventor： HOWSE CURTIS L , LOWELL CORNELIUS D
IPC: F28G3/16
CPC classification number: F28G3/166
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