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водоумягчительная установка stresses
ecol.	softening installation; softening plant
met.	water-softening plant
polym.	water softening plant
railw.	water purification plant; water softener
tech.	water softening unit
therm.eng.	water purifier

водоумягчительная установка: 4 phrases in 2 subjects

Nautical	2
Textile industry	2