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发明名称
STABILIZER FOR EXCAVATION STRING CAPABLE OF BEING LOOSENED
摘要
申请公布号
JPS55155897(A)
申请公布日期
1980.12.04
申请号
JP19800058760
申请日期
1980.05.06
申请人
MORICH TOOL CO
发明人
EDOWAADO ERU MOOZESU JIYUNIA;BAANON TEII RITSUCHII
分类号
E21B17/10
主分类号
E21B17/10
代理机构
代理人
主权项
地址
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