noun
cylindrical boiler
A boiler with a cylindrical shape, used in industrial or heating contexts.
工場では古い円缶がまだ使われている。
An old cylindrical boiler is still used in the factory.
Compound of 円 (まる, 'round') and 缶 (かま, 'boiler'). The reading まるがま is a straightforward combination of the kun'yomi readings of the two kanji.