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发明名称
(B1) ;SWIVEL
摘要
申请公布号
PL225841(A1)
申请公布日期
1982.02.01
申请号
PL19800225841
申请日期
1980.07.24
申请人
OS BAD ROZWOJOWY TECH GEO
发明人
RICHTER JERZY;RAPP BOGUSLAW;REDA KRZYSZTOF
分类号
E21B;E21B21/00;E21B21/02;(IPC1-7):E21B/
主分类号
E21B
代理机构
代理人
主权项
地址
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