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发明名称
METHOD OF CONSTRUCTION OF EXCAVATION AND ITS DEVICE
摘要
申请公布号
JPS5451211(A)
申请公布日期
1979.04.21
申请号
JP19770117442
申请日期
1977.09.30
申请人
NIPPON STEEL CORP;KOKEN BORING MACHINE CO
发明人
NIIMI YOSHIKAZU;ISA TAKAYOSHI;EGUCHI TAKUMI
分类号
E02D5/38;E21B7/20
主分类号
E02D5/38
代理机构
代理人
主权项
地址
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