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发明名称
METHOD OF THERMOCHEMICALLY TREATING DRILLING PIPES TO BE USED IN MINING
摘要
申请公布号
PL291848(A1)
申请公布日期
1993.04.05
申请号
PL19910291848
申请日期
1991.09.25
申请人
WASYLECZKO ZENON
发明人
WASYLECZKO ZENON
分类号
C21D9/22;(IPC1-7):C21D9/22
主分类号
C21D9/22
代理机构
代理人
主权项
地址
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