回かい転てん篩ぶるい

noun

trommel; rotary screen; revolving sieve

Technical term used in mining, construction, waste processing, and similar industrial contexts for a rotating cylindrical sieve that separates materials by size.

• この工こう場じょうでは、回かい転てん篩ぶるいを使つかって砂利じゃりを大おおきさごとに分わけている。

  At this plant, they use a trommel to separate gravel by size.