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发明名称
Apparatus for cleaning air in coal mines
摘要
申请公布号
US4869737(A)
申请公布日期
1989.09.26
申请号
US19890296236
申请日期
1989.01.12
申请人
PARENTI, JOSEPH A.
发明人
PARENTI, JOSEPH A.
分类号
E21F5/00;B01D46/00;B01D46/42;B01D46/46;B01D50/00;B04C3/04;E21F5/20;F24F7/00
主分类号
E21F5/00
代理机构
代理人
主权项
地址
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