vodovodné inštalácie 5 [vynechat] water supply installations vodovodné potrubia 2 [vynechat] water pipelines 2 [vynechat] domová kanalizácia 1 [vynechat] house drains 1 [vynechat] regulating technology 1 [vynechat] regulačná technika 1 [vynechat] technické zariadenia budov 1 [vynechat] technological equipment of buildings 1 [vynechat] vodárenstvo 1 [vynechat] water supply engineering 1 [vynechat]