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发明名称
METHOD OF REDUCING FRICTION OF UNDERGROUND BURIED PIPE IN METHOD OF PROPULSION CONSTRUCTION
摘要
申请公布号
JPS61113995(A)
申请公布日期
1986.05.31
申请号
JP19840233051
申请日期
1984.11.07
申请人
FUJITA CORP
发明人
CHICHIBU AKIYOSHI;KOTANI KATSUAKI
分类号
E21D9/06
主分类号
E21D9/06
代理机构
代理人
主权项
地址
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