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发明名称
Method of construction of sound absorbing passages
摘要
申请公布号
GB657800(A)
申请公布日期
1951.09.26
申请号
GB19490005298
申请日期
1949.02.26
申请人
LES TRAVAUX SOUTERRAINS
发明人
分类号
E04B1/82
主分类号
E04B1/82
代理机构
代理人
主权项
地址
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