filter paper        
noun uk/ˈfɪl.tə ˌpeɪ.pər/ us/ˈfɪl.t̬ɚ ˌpeɪ.pɚ/
 [ U ]滤纸 
thin paper that allows only liquid to flow through
  [ C ] UK(滴滤式咖啡)滤纸 
a paper cone that allows only water through and is used to make filter coffee
 
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