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公开(公告)号：CA546809A
公开(公告)日：1957-10-01
申请号：CA546809D
Applicant: B B CHEM CO CANADA
Inventor： HALL ALAN M , WOOLMAN RONALD
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公开(公告)号：CA639866A
公开(公告)日：1962-04-17
申请号：CA639866D
Applicant: B B CHEM CO CANADA
Inventor： LEE GRAHAM R , WOODS ARTHUR D , MASON CHARLES E , HALL ALAN M
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