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发明名称
Dual material speaker surrounds
摘要
申请公布号
GB0117643(D0)
申请公布日期
2001.09.12
申请号
GB20010017643
申请日期
2001.07.19
申请人
SCHLUMBERGER INDUSTRIES LIMITED
发明人
分类号
主分类号
代理机构
代理人
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地址
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