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公开(公告)号：US873300A
公开(公告)日：1907-12-10
申请号：US1907372347
申请日：1907-05-07
Applicant: CRANSTON ALFRED P
Inventor： CRANSTON ALFRED P
CPC classification number: B65G53/523 , Y10S193/02 , Y10S285/911
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