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经营范围
发明名称
PRISTRESS CONCRETE STEEL BAR AND WIRE
摘要
申请公布号
KR930012255(B1)
申请公布日期
1993.12.28
申请号
KR19900018141
申请日期
1990.11.09
申请人
NIPPON STEEL CORP.;HIGH FREQUENCY HEAT-TREATMENT CO., LTD.
发明人
SATO, HIROSHI;YAMASHITA, HIDEHARU;NITTA, KAZU;MIJOGUCHI, SHIGERU
分类号
B21F9/00;(IPC1-7):B21F9/00
主分类号
B21F9/00
代理机构
代理人
主权项
地址
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