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发明名称
PERFORATED PIPE ROD CONNECTING DEVICE
摘要
申请公布号
JPH06330687(A)
申请公布日期
1994.11.29
申请号
JP19930141200
申请日期
1993.05.21
申请人
NIT CO LTD;TOKIWA KENSETSU KK;YOSHIDA TEKKOSHO:KK
发明人
NAKANISHI WATARU;NAKAJIMA SHIRO;TANAKA NORIO
分类号
E02D3/12;E21B17/02;(IPC1-7):E21B17/02
主分类号
E02D3/12
代理机构
代理人
主权项
地址
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