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发明名称
PRESSURE ACTUATED CLEANING TOOL
摘要
申请公布号
GB8806957(D0)
申请公布日期
1988.04.27
申请号
GB19880006957
申请日期
1988.03.23
申请人
OTIS ENG CORPORATION
发明人
分类号
E21B23/00;E21B37/00;E21B41/00;(IPC1-7):B08B/
主分类号
E21B23/00
代理机构
代理人
主权项
地址
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