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发明名称
SCREW SOIL DISCHARGING METHOD FOR SHIELDED EXCAVATOR
摘要
申请公布号
JPS5641993(A)
申请公布日期
1981.04.18
申请号
JP19790116571
申请日期
1979.09.10
申请人
HITACHI SHIPBUILDING ENG CO
发明人
YOSHIKAWA TADAO
分类号
E21D9/12
主分类号
E21D9/12
代理机构
代理人
主权项
地址
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