Jisho

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Noun, Suru verb, Transitive verb
1. filtration; filtering; percolation
Wikipedia definition
2. FiltrationFiltration is commonly the mechanical or physical operation which is used for the separation of solids from fluids (liquids or gases) by interposing a medium through which only the fluid can pass. Oversize solids in the fluid are retained, but the separation is not complete; solids will be contaminated with some fluid and filtrate will contain fine particles (depending on the pore size and filter thickness).
Read “Filtration” on English Wikipedia
Read “ろ過” on Japanese Wikipedia
Read “Filtration” on DBpedia
Other forms
ろ過 【ろか】

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