发明授权
US4383925A Filters 失效
过滤器

Filters
摘要:
A filter device suitable for filtering sludges which comprises (A) a tube-like filter as an outer wall consisting of a fabric of polyester or polyamide filament yarn which acts as a support for (B) an inner layer consisting of a non-woven fabric of man-made fibres and a process of dewatering industrial sludge.
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