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公开(公告)号：US1484809A
公开(公告)日：1924-02-26
申请号：US48293121
申请日：1921-07-07
Applicant: CARGILE CHESLEY B
Inventor： CARGILE CHESLEY B
IPC: E01B31/06
CPC classification number: E01B31/06 , Y10T408/5623 , Y10T408/5626
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