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发明名称
TOBACCO SMOKE FILTER & METHOD
摘要
This invention relates to a cigarette filter composed of two concentric cylindrical layers of fibrous filter materials, in which the inner cylindrical layer has a lower draw resistance than the outer cylindrical layer.
申请公布号
AU1541676(A)
申请公布日期
1978.01.05
申请号
AU19760015416
申请日期
1976.06.29
申请人
LIGGETT & MYERS INC.
发明人
FLOYD VAN HALL
分类号
A24D3/02;A24D3/10
主分类号
A24D3/02
代理机构
代理人
主权项
地址
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