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发明名称
Dust collecting head
摘要
申请公布号
US2829867(A)
申请公布日期
1958.04.08
申请号
US19540437945
申请日期
1954.06.21
申请人
MINE SAFETY APPLIANCES COMPANY
发明人
BROCHETTI RAYMOND E.
分类号
B23Q11/00;E21B21/015
主分类号
B23Q11/00
代理机构
代理人
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