tooriku/detaili jahutamine vees termotöötlemisel, samuti tehnoloogilise sisseade (nt ahi) temperatuuri vee abil alandamine (vrd õlijahutus, õhkjahutus), cooling of a workpiece in water during heat treatment; also process of reducing equipment (e.g. furnace) temperature by water (compare: oil cooling, air cooling), охлаждение детали в воде при термообработке (ср. охлаждение в масле, охлаждение на воздухе)