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发明名称
Apparatus and method for producing building boards
摘要
申请公布号
US2689975(A)
申请公布日期
1954.09.28
申请号
US19520266558
申请日期
1952.01.15
申请人
MARIA LENG FRANZ
发明人
LENG FRANZ MARIA
分类号
B28B1/52
主分类号
B28B1/52
代理机构
代理人
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