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发明名称
MANHOLE STEP PASSING TOOL
摘要
申请公布号
JPS57177208(A)
申请公布日期
1982.10.30
申请号
JP19810062284
申请日期
1981.04.24
申请人
NIPPON DENSHIN DENWA KOSHA;YASUDA SEISAKUSHO:KK
发明人
HARADA MASAHARU;KASAHARA NOBUMOTO;HIROSE MITSUHIDE;IMAI MASAYASU;SATOU MASANOBU
分类号
G02B6/46;G02B6/44;H02G1/06
主分类号
G02B6/46
代理机构
代理人
主权项
地址
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