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经营范围
发明名称
Устройство для бурения глубоких скважин
摘要
申请公布号
SU120189(A1)
申请公布日期
1958.11.30
申请号
SU19570580462
申请日期
1957.07.13
申请人
GUSMAN M.T.;IOANNESYAN R.A.
发明人
GUSMAN M.T.;IOANNESYAN R.A.
分类号
E21B21/00;E21B4/02
主分类号
E21B21/00
代理机构
代理人
主权项
地址
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