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发明名称
Пакер с резиновым уплотнением и плашками
摘要
申请公布号
SU107827(A1)
申请公布日期
1956.11.30
申请号
SU19560551437
申请日期
1956.04.24
申请人
MAMVRIJSKIJ A.S.
发明人
MAMVRIJSKIJ A.S.
分类号
E21B33/12;E21B33/129
主分类号
E21B33/12
代理机构
代理人
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地址
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