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发明名称
PERIPHERAL FRICTION REDUCING METHOD FOR UNDERGROUND SETTLED OBJECT AND SETTLED OBJECT
摘要
申请公布号
JPH02269226(A)
申请公布日期
1990.11.02
申请号
JP19890089975
申请日期
1989.04.10
申请人
NITSUKAI:KK
发明人
MATSUDA KIYOSHI
分类号
E02D23/14
主分类号
E02D23/14
代理机构
代理人
主权项
地址
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