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发明名称
Mortar joint simulator tool
摘要
申请公布号
US2945253(A)
申请公布日期
1960.07.19
申请号
US19570677081
申请日期
1957.08.08
申请人
BILLINGS ROY O
发明人
BILLINGS ROY O.
分类号
E04F21/00;E04F21/165
主分类号
E04F21/00
代理机构
代理人
主权项
地址
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