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发明名称
FIRST STAGE MECHANICAL PUMP FOR USE IN A TWO STAGE VACUUM PUMPING SYSTEM
摘要
申请公布号
CA570348(A)
申请公布日期
1959.02.10
申请号
CAD570348
申请日期
申请人
THE NEW YORK AIR BRAKE COMPANY
发明人
CHESTER M. VAN ATTA
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主分类号
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