-
公开(公告)号：US3070881A
公开(公告)日：1963-01-01
申请号：US71042458
申请日：1958-01-22
Applicant: NAT RES DEV
Inventor： HAROLD BROOKS , MCDONALD FORSYTH JOHN IRVINE , IVOR LEWIS GERALD
IPC: B21B3/00 , B23K20/233
CPC classification number: B21B3/00 , B23K20/233 , Y10S428/939 , Y10S428/94 , Y10T428/12833
Search Results
1
records
(took 0.009 seconds)
筛选
AND
AND
过滤
NOT
NOT
Scan to Join
