filter paper
濾紙
filter paper /-ˌpepɚ/ 名詞
濾紙
Fil·ter, v. t. [imp. & p. p. Filtered p. pr. & vb. n. Filtering] To purify or defecate, as water or other liquid, by causing it to pass through a filter.
Filtering paper, or Filter paper, a porous unsized paper, for filtering.
filter paper
n : a porous unsized paper used for filtering