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发明名称
SPRING MAKING APPARATUS ESPECIALLY FOR MAKING DOUBLE VOLUTE SPRINGS
摘要
申请公布号
PL113914(B1)
申请公布日期
1981.01.31
申请号
PL19770197246
申请日期
1977.04.06
申请人
发明人
分类号
B21F;B21F3/04;(IPC1-7):B21F3/04
主分类号
B21F
代理机构
代理人
主权项
地址
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