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发明名称
Valve bushing device
摘要
申请公布号
US1952146(A)
申请公布日期
1934.03.27
申请号
US19310511367
申请日期
1931.01.26
申请人
SPRAKER MANUFACTURING CO.
发明人
SPRAKER DAVID L.
分类号
B25B27/00
主分类号
B25B27/00
代理机构
代理人
主权项
地址
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