Szczepan Woźniak

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

43.31.Z - Plastering

43.99.Z - Other specialised construction activities not elsewhere classified

61.20.Z - Wireless telecommunications activities, excluding satellite telecommunications activities

61.90.Z - Other telecommunications activities

62.03.Z - Computer facilities management activities

62.09.Z - Other information technology and computer service activities