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发明名称
Устройство для подземных выработок в мягких породах
摘要
申请公布号
SU85222(A1)
申请公布日期
1949.11.30
申请号
SU19490395749
申请日期
1949.04.19
申请人
PLYUSNIN A.K.
发明人
PLYUSNIN A.K.
分类号
E21C27/22;E21C25/08
主分类号
E21C27/22
代理机构
代理人
主权项
地址
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