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发明名称
Improvements in apparatus for making metal floor panels
摘要
申请公布号
US2021893(A)
申请公布日期
1935.11.26
申请号
US19330688628
申请日期
1933.09.08
申请人
BELMONT IRON WORKS
发明人
MITCHELL JOHN A.
分类号
B23K37/04
主分类号
B23K37/04
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代理人
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