plynové rozvody 2 [vynechat] Gas distributions 1 [vynechat] Gas installations 1 [vynechat] Technical standards 1 [vynechat] budovy 1 [vynechat] buildings 1 [vynechat] gas distribution 1 [vynechat] gas pipelines 1 [vynechat] gas supply 1 [vynechat] plynovody 1 [vynechat] plynové inštalácie 1 [vynechat] technické normy a štandardy 1 [vynechat] zásobovanie plynom 1 [vynechat]