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发明名称
Pneumatic discharge swab
摘要
申请公布号
US1833778(A)
申请公布日期
1931.11.24
申请号
US19240747631
申请日期
1924.11.03
申请人
HUGHES TOOL COMPANY
发明人
FLETCHER HAROLD W.
分类号
F04B47/12
主分类号
F04B47/12
代理机构
代理人
主权项
地址
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