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发明名称
Tuyau en béton armé avec enveloppe d'étanchéité noyée dans le béton
摘要
申请公布号
FR870635(A)
申请公布日期
1942.03.18
申请号
FRD870635
申请日期
1940.11.20
申请人
LE TUBE D'ACIER
发明人
分类号
B28B21/58;F16L25/00
主分类号
B28B21/58
代理机构
代理人
主权项
地址
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