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公开(公告)号：US2863060A
公开(公告)日：1958-12-02
申请号：US51640655
申请日：1955-06-20
Applicant: PHILLIPS PETROLEUM CO
Inventor： WILLIS JOSEPH B
IPC: G01N21/35
CPC classification number: G01N21/3504
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公开(公告)号：US2827539A
公开(公告)日：1958-03-18
申请号：US52047355
申请日：1955-07-07
Applicant: PHILLIPS PETROLEUM CO
Inventor： SMITH DEXTER E , WILLIS JOSEPH B
CPC classification number: G01N21/255 , G01J3/108
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