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发明名称
GRANULATE-TYPE LAYERED FILTER
摘要
申请公布号
YU40217(B)
申请公布日期
1985.08.31
申请号
YU19790000987
申请日期
1979.04.25
申请人
STELCER JOSIP
发明人
STELCER JOSIP;STELCER JOSIP
分类号
E21B43/00;E21B43/02;E21C41/00;(IPC1-7):E21B43/02
主分类号
E21B43/00
代理机构
代理人
主权项
地址
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