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发明名称
METHOD AND DEVICE FOR OPENING PIPE HOLE
摘要
申请公布号
JPH04100643(A)
申请公布日期
1992.04.02
申请号
JP19900220778
申请日期
1990.08.21
申请人
KASAI YOSHITA
发明人
KASAI YOSHITA
分类号
B21D28/28;B21D28/34
主分类号
B21D28/28
代理机构
代理人
主权项
地址
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