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发明名称
FACEPIECE FASTENER
摘要
申请公布号
CA416173(A)
申请公布日期
1943.11.02
申请号
CAD416173
申请日期
申请人
MINE SAFETY APPLIANCES COMPANY
发明人
JOHN FREDERICK DAUSTER
分类号
主分类号
代理机构
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