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发明名称
DEVICE FOR SILENCING IMPULSIVE NOISES DUE TO RAPID ENTRY INTO TUNNEL
摘要
申请公布号
JPS5431933(A)
申请公布日期
1979.03.09
申请号
JP19770098035
申请日期
1977.08.16
申请人
DATE KUNIO
发明人
DATE KUNIO
分类号
E21D9/14;E21D11/38
主分类号
E21D9/14
代理机构
代理人
主权项
地址
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