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经营范围
发明名称
Cement gun nozzle
摘要
申请公布号
US1902202(A)
申请公布日期
1933.03.21
申请号
US19290417467
申请日期
1929.12.30
申请人
VAWTER JOHN T
发明人
VAWTER JOHN T.
分类号
E04F21/12
主分类号
E04F21/12
代理机构
代理人
主权项
地址
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