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发明名称
Sprinkler head
摘要
申请公布号
US2312252(A)
申请公布日期
1943.02.23
申请号
US19400365982
申请日期
1940.11.16
申请人
JOHNSON JOHN M
发明人
JOHNSON JOHN M.
分类号
A62C37/10
主分类号
A62C37/10
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代理人
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