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发明名称
新型大昌式梯形双沟防台雨相透防台雨水泥瓦(追加专利)
摘要
申请公布号
TW006345
申请公布日期
1970.05.01
申请号
TW008488
申请日期
1970.02.13
申请人
徐启良
发明人
徐启泉
分类号
E04C
主分类号
E04C
代理机构
代理人
主权项
地址
美国
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