发明申请
US20060266693A1 Filter 审中-公开
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Filter
摘要:
Filter (30) may comprise a first filter cloth (36) and a second filter cloth (32) disposed downstream from the first filter cloth (36). A particle diameter allowed passage by the second filter cloth (32) may be smaller than a particle diameter allowed passage by the first filter cloth (36). A space (34) may be provided between the first filter cloth (36) and the second filter cloth (32), the space (34) allowing the passage of foreign matter having a particle diameter greater than the particle diameter allowed passage by the first filter cloth (36).
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