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公开(公告)号：US2467843A
公开(公告)日：1949-04-19
申请号：US66173046
申请日：1946-04-12
Applicant: EDWARD MCDOWELL
Inventor： EDWARD MCDOWELL
IPC: B66C11/20
CPC classification number: B66C11/20
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公开(公告)号：US1327717A
公开(公告)日：1920-01-13
申请号：US23817118
申请日：1918-06-04
Applicant: EDWARD MCDOWELL
Inventor： EDWARD MCDOWELL
IPC: B60C7/02
CPC classification number: B60C7/02 , Y10T152/10396
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