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公开(公告)号：US1687353A
公开(公告)日：1928-10-09
申请号：US1926925
申请日：1925-03-30
Applicant: A L POWELL POWER COMPANY INC
Inventor： SWANSON VERNER J
IPC: F02F1/36
CPC classification number: F02F1/365
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