-
公开(公告)号：US1977619A
公开(公告)日：1934-10-23
申请号：US53016231
申请日：1931-04-15
Applicant: ALUMINUM CO OF AMERICA
Inventor： BOYER DAVID A , REARICK WALTER S
IPC: B21B37/18
CPC classification number: B21B37/18 , Y10S388/93
Search Results
1
records
(took 0.011 seconds)
筛选
AND
AND
过滤
NOT
NOT
Scan to Join
