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发明名称
SPIRAL PIPE PRODUCING APPARATUS
摘要
申请公布号
CA661117(A)
申请公布日期
1963.04.09
申请号
CAD661117
申请日期
申请人
BENTWORTH ENGINEERS NV
发明人
GERALD K. HALE;ARTHUR W. HALE;REGINALD D. HALE
分类号
主分类号
代理机构
代理人
主权项
地址
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