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发明名称
Method and apparatus for making helically wound tubes
摘要
申请公布号
US2048360(A)
申请公布日期
1936.07.21
申请号
US19340713768
申请日期
1934.03.02
申请人
SPANEL
发明人
SPANEL ABRAHAM N.;HENRY WILLIAM C.
分类号
B31C3/00
主分类号
B31C3/00
代理机构
代理人
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地址
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