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发明名称
Improvements in making lock washers
摘要
申请公布号
GB822035(A)
申请公布日期
1959.10.21
申请号
GB19560014101
申请日期
1956.05.07
申请人
ILLINOIS TOOL WORKS
发明人
BEART ROBERT WOODWARD
分类号
B21D53/20
主分类号
B21D53/20
代理机构
代理人
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