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发明名称
CONTROLLED HEAT WELDING OF THERMOPLASTIC PIPE FITTING
摘要
申请公布号
KR1019900007349(B1)
申请公布日期
1990.10.08
申请号
KR1019860003430
申请日期
1986.05.01
申请人
发明人
分类号
主分类号
代理机构
代理人
主权项
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