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发明名称
Method of making perforated composition plasterboard
摘要
申请公布号
US2633441(A)
申请公布日期
1953.03.31
申请号
US19500178152
申请日期
1950.08.07
申请人
BUTTRESS GEORGE A
发明人
BUTTRESS GEORGE A.
分类号
B28B1/48;B28B11/12;B29C65/74;B29C67/00;E04C2/04
主分类号
B28B1/48
代理机构
代理人
主权项
地址
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