-
公开(公告)号：US2283510A
公开(公告)日：1942-05-19
申请号：US39627741
申请日：1941-06-02
Applicant: STANDARD OIL CO CALIFORNIA
Inventor： POTTER CHARLES M
IPC: E21B21/00
CPC classification number: E21B21/00
Search Results
1
records
(took 0.011 seconds)
筛选
AND
AND
过滤
NOT
NOT
Scan to Join
