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发明名称
Improvements in means for punching holes in tanks or cisterns
摘要
申请公布号
GB427599(A)
申请公布日期
1935.04.26
申请号
GB19340022058
申请日期
1934.07.28
申请人
JOHN SIMPSON;GEORGE SIMPSON
发明人
分类号
B21D28/34
主分类号
B21D28/34
代理机构
代理人
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地址
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