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公开(公告)号：CA841395A
公开(公告)日：1970-05-12
申请号：CA841395D
Applicant: NORRIS INDUSTRIES
Inventor： RUSSELL FRED J , WITT JOSEPH D , CIROCCO PAUL
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公开(公告)号：CA841394A
公开(公告)日：1970-05-12
申请号：CA841394D
Applicant: NORRIS INDUSTRIES
Inventor： RUSSELL FRED J , CIROCCO PAUL , WITT JOSEPH D
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