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发明名称
异型钢管(4)
摘要
申请公布号
CN3075812D
申请公布日期
1998.03.18
申请号
CN97310122.9
申请日期
1997.04.29
申请人
北京市朝阳区隆华焊接钢管厂
发明人
张玉忠 ; 陈曙光 ; 平 友 ; 魏民志
分类号
25-01-A0118
主分类号
25-01-A0118
代理机构
北京市专利事务所
代理人
胡福恒
主权项
地址
100025北京市朝阳区姚家园朝阳区隆华钢窗厂院内
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