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发明名称
TUNNEL VENTILATION DEVICE
摘要
申请公布号
JPH03271500(A)
申请公布日期
1991.12.03
申请号
JP19900071545
申请日期
1990.03.19
申请人
NISSIN ELECTRIC CO LTD
发明人
JO SHINICHI
分类号
E21F1/00
主分类号
E21F1/00
代理机构
代理人
主权项
地址
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