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发明名称
英语自主学机(语航者)
摘要
申请公布号
CN300803893D
申请公布日期
2008.07.16
申请号
CN200730161857.2
申请日期
2007.07.24
申请人
北京天力友兰文化艺术发展有限责任公司
发明人
董青山
分类号
14-01
主分类号
14-01
代理机构
代理人
主权项
地址
100075北京市丰台区莲花池南里27号楼办公403室
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