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发明名称
Dustproof damper
摘要
申请公布号
US2668684(A)
申请公布日期
1954.02.09
申请号
US19490099969
申请日期
1949.06.18
申请人
METZGER WALTER F
发明人
METZGER WALTER F.
分类号
F16K13/02
主分类号
F16K13/02
代理机构
代理人
主权项
地址
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