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发明名称
Spiral conveyer flight and method of making the same
摘要
申请公布号
US1748206(A)
申请公布日期
1930.02.25
申请号
US19260122549
申请日期
1926.07.15
申请人
CHRISTIAN JOSEPH D
发明人
CHRISTIAN JOSEPH D.
分类号
B21C37/26
主分类号
B21C37/26
代理机构
代理人
主权项
地址
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