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发明名称
Valve control means for a vacuum back
摘要
申请公布号
US3077141(A)
申请公布日期
1963.02.12
申请号
US19600058809
申请日期
1960.09.27
申请人
ROBERTSON PHOTO-MECHANIX, INC.
发明人
WANIELISTA WALTER;JR. CHARLES P. SIPPEL,
分类号
G03B27/60
主分类号
G03B27/60
代理机构
代理人
主权项
地址
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