noun
two-tub washing machine
Refers to a washing machine with separate tubs for washing and spinning; common in older Japanese homes.
祖母はまだ二槽式の洗濯機を使っている。
My grandmother still uses a two-tub washing machine.
Compound of 二 (two), 槽 (tub), and 式 (type/style). The exact historical derivation is uncertain, but the term straightforwardly describes a two-tub design.