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经营范围
发明名称
HELICAL TENSION SPRING
摘要
申请公布号
GB1470076(A)
申请公布日期
1977.04.14
申请号
GB19740024192
申请日期
1974.05.31
申请人
HUHNEN J
发明人
分类号
B21F3/027;B21F35/02;F16F1/06;F16F1/12;(IPC1-7):F16F1/06
主分类号
B21F3/027
代理机构
代理人
主权项
地址
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