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发明名称
HYDRAULIC VERSA-TRIEVE PACKER
摘要
申请公布号
GB8904284(D0)
申请公布日期
1989.04.12
申请号
GB19890004284
申请日期
1989.02.24
申请人
OTIS ENGINEERING CORPORATION
发明人
分类号
E21B33/1295;(IPC1-7):E21B33/128
主分类号
E21B33/1295
代理机构
代理人
主权项
地址
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