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经营范围
发明名称
SWIVEL JOINT FOR EXCAVATION
摘要
申请公布号
JPS55138588(A)
申请公布日期
1980.10.29
申请号
JP19790045341
申请日期
1979.04.16
申请人
HITACHI CONSTRUCTION MACHINERY
发明人
KUSUMI HIROSHI;WADA MASAMI
分类号
E21B17/05
主分类号
E21B17/05
代理机构
代理人
主权项
地址
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