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公开(公告)号:US3518228A
公开(公告)日:1970-06-30
申请号:US3518228D
申请日:1967-09-11
Applicant: NAT RES DEV
Inventor: NIXON BRIAN , PHILLIPS LESLIE NATHAN
公开(公告)号:US3518228A
公开(公告)日:1970-06-30
申请号:US3518228D
申请日:1967-09-11
Applicant: NAT RES DEV
Inventor: NIXON BRIAN , PHILLIPS LESLIE NATHAN