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发明名称
(B2) ;FREEZING PIPE STRING
摘要
申请公布号
PL223252(A2)
申请公布日期
1981.04.24
申请号
PL19800223252
申请日期
1980.04.04
申请人
AKAD GORNICZO HUTNICZA
发明人
MACHOWSKI MARIAN;STOPKA ZYGMUNT
分类号
E21D;E21D1/14;(IPC1-7):E21D/
主分类号
E21D
代理机构
代理人
主权项
地址
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