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发明名称
Manufacturing cementitious hollow body
摘要
申请公布号
US1955760(A)
申请公布日期
1934.04.24
申请号
US19320630335
申请日期
1932.08.25
申请人
NICHOLS CLIFFORD R
发明人
NICHOLS CLIFFORD R.
分类号
B28B7/34;B28B7/38;B28B21/30;B28B21/90
主分类号
B28B7/34
代理机构
代理人
主权项
地址
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