-
公开(公告)号：US1886210A
公开(公告)日：1932-11-01
申请号：US53510631
申请日：1931-05-05
Applicant: PITTSBURGH FORGING CO
Inventor： ANSON MITCHELL RALPH
IPC: B21K21/00
CPC classification number: B21K21/00
Search Results
1
records
(took 0.008 seconds)
筛选
AND
AND
过滤
NOT
NOT
Scan to Join
