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发明名称
SUBMERGED ARC WELDING METHOD AT HIGH SPEED FOR SPIRAL STEEL PIPE
摘要
申请公布号
JPH02200381(A)
申请公布日期
1990.08.08
申请号
JP19890019762
申请日期
1989.01.31
申请人
NIPPON STEEL CORP
发明人
OYAMA SHIGEO;KATO TAKASHI;KITAMURA YUKIYOSHI
分类号
B23K9/18;B23K35/362
主分类号
B23K9/18
代理机构
代理人
主权项
地址
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