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.
この工場では、回転篩を使って砂利を大きさごとに分けている。
At this plant, they use a trommel to separate gravel by size.
篩 is a general sieve or screen; 回転篩 specifically refers to a rotating cylindrical version.
Compound of 回転 (rotation) and 篩 (sieve), directly describing a rotating sieve.