-
公开(公告)号：US2819949A
公开(公告)日：1958-01-14
申请号：US33178453
申请日：1953-01-19
Applicant: SHELL DEV
Inventor： KEELER WILLIAM R , EVANS ROY J , PREROTTI GINO J
IPC: C01B15/013
CPC classification number: C01B15/013
Search Results
1
records
(took 0.017 seconds)
筛选
AND
AND
过滤
NOT
NOT
Scan to Join
