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发明名称
METHOD OF MINING COAL WITH AUGER FOR STEEP SLOPE
摘要
申请公布号
JPS5631990(A)
申请公布日期
1981.03.31
申请号
JP19790107076
申请日期
1979.08.24
申请人
SANWA ENGINEERING YUUGEN
发明人
MIWA SATORU
分类号
E21C41/18;E21C41/00
主分类号
E21C41/18
代理机构
代理人
主权项
地址
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