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经营范围
发明名称
Perfectionnement aux cadres arqués pour galeries souterraines
摘要
申请公布号
FR1175338(A)
申请公布日期
1959.03.24
申请号
FRD1175338
申请日期
1957.05.17
申请人
LE PROGRES CHARBONNIER
发明人
分类号
E21D11/18
主分类号
E21D11/18
代理机构
代理人
主权项
地址
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