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发明名称
摘要
申请公布号
JPS4898429(A)
申请公布日期
1973.12.14
申请号
JP19720029772
申请日期
1972.03.27
申请人
发明人
分类号
F16L21/02;B25B27/02;F16L21/00
主分类号
F16L21/02
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代理人
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