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经营范围
发明名称
Welding nozzles
摘要
申请公布号
US2977457(A)
申请公布日期
1961.03.28
申请号
US19580750445
申请日期
1958.07.23
申请人
NATIONAL RESEARCH DEVELOPMENT CORPORATION
发明人
HOULDCROFT PETER THOMAS;SMITH ARTHUR ALFRED
分类号
B23K9/29;B23K9/32
主分类号
B23K9/29
代理机构
代理人
主权项
地址
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