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发明名称
VACUUM CONTROLS
摘要
申请公布号
CA468869(A)
申请公布日期
1950.10.24
申请号
CAD468869
申请日期
申请人
ARTHUR E. BROUGHTON
发明人
ARTHUR E. BROUGHTON
分类号
主分类号
代理机构
代理人
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