Kruszywa Krzysztof Wiśniewski

08.12.Z - Operation of gravel and sand pits; mining of clays and kaolin

09.90.Z - Support activities for other mining and quarrying

46.63.Z - Wholesale of mining, construction and civil engineering machinery

62.01.Z - Computer programming activities

62.02.Z - Computer consultancy activities

62.03.Z - Computer facilities management activities

62.09.Z - Other information technology and computer service activities

63.11.Z - Data processing, hosting and related activities

70.22.Z - Business and other management consultancy activities