Petroleum processing spracovanie ropy 2 [vynechat] technické normy a štandardy 2 [vynechat] Butane 1 [vynechat] Fuels 1 [vynechat] Liquid fuels 1 [vynechat] Lubrication and lubricants 1 [vynechat] Propane 1 [vynechat] bután 1 [vynechat] kvapalné palivá 1 [vynechat] mazadlá 1 [vynechat] palivá 1 [vynechat] propán 1 [vynechat]