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发明名称
METHOD OF BOTTOM CASTING STEEL INGOTS USING LOW VACUUM OF FROM 610 TO 310 MM. HG ABSOLUTE
摘要
申请公布号
US3621903(A)
申请公布日期
1971.11.23
申请号
USD3621903
申请日期
1967.12.26
申请人
NIPPON KOKAN KK.
发明人
YUZURU DOI;KOZO YAMADA
分类号
B22D27/00;B22D27/15;(IPC1-7):B22D27/16
主分类号
B22D27/00
代理机构
代理人
主权项
地址
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