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发明名称
HYDRAULISCH BETAETIGBARE, WIEDERENTNEHMBARE DICHTUNG
摘要
申请公布号
DE3921189(A1)
申请公布日期
1990.03.22
申请号
DE19893921189
申请日期
1989.06.28
申请人
OTIS ENGINEERING CORP., CARROLLTON, TEX., US
发明人
ROSS, COLBY MUNRO;WHITE, PAT MURPHY, CARROLLTON, TEX., US
分类号
E21B33/1295
主分类号
E21B33/1295
代理机构
代理人
主权项
地址
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