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发明名称
SPIRAL PIPE PRODUCING METHOD
摘要
申请公布号
JPS5577990(A)
申请公布日期
1980.06.12
申请号
JP19780149519
申请日期
1978.11.30
申请人
SUMITOMO METAL IND
发明人
NISHIMURA MASAYA
分类号
B21C37/12;B23K9/032;B23K31/00
主分类号
B21C37/12
代理机构
代理人
主权项
地址
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