1. Zakład Eksploatacji Kruszyw i Robót Ziemnych Jeziorek Piotr, Jeziorek Sławomir, Dziubek Leszek s.c. 2. DS Własna Energia Jeziorek Sławomir

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

08.11.Z - Quarrying of ornamental and building stone, limestone, gypsum, chalk and slate

26.11.Z - Manufacture of electronic components

27.11.Z - Manufacture of electric motors, generators and transformers

27.12.Z - Manufacture of electricity distribution and control apparatus

27.20.Z - Manufacture of batteries and accumulators

33.12.Z - Repair and maintenance of machinery

33.14.Z - Repair and maintenance of electrical equipment

35.11.Z - Production of electricity

35.12.Z - Transmission of electricity

35.13.Z - Distribution of electricity

35.14.Z - Trade of electricity

39.00.Z - Remediation activities and other waste management services

42.11.Z - Works related to construction of roads and motorways

42.12.Z - Works related to construction of railways and underground railways

42.13.Z - Works related to construction of bridges and tunnels

42.22.Z - Works related to construction of telecommunications and electricity lines

42.91.Z - Works related to construction of water projects

43.11.Z - Demolition

43.12.Z - Site preparation

43.13.Z - Test drilling and boring

43.21.Z - Electrical installation

43.22.Z - Plumbing, heat and air-conditioning installation

43.29.Z - Other construction installation

43.99.Z - Other specialised construction activities not elsewhere classified

46.43.Z - Wholesale of electrical household appliances

46.52.Z - Wholesale of electronic and telecommunications equipment and parts thereof

46.73.Z - Wholesale of wood, construction materials and sanitary equipment

47.91.Z - Retail sale via mail order houses or via Internet

49.41.Z - Freight transport by road

73.11.Z - Advertising agencies activities