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发明名称
Cement gun nozzle
摘要
申请公布号
US1885645(A)
申请公布日期
1932.11.01
申请号
US19300418489
申请日期
1930.01.04
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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