Performing Maintenance Services In Full Technical Condition Of Slk Announcement Communication Units Manufactured By Kzł Bydgoszcz And Sdh Teletransmission Devices Listed In Annex No. 1 By Carrying Out Periodic Inspections And Emergency And Planned Repairs /In Accordance With Ie-13 § 35,84,89/ At The Railway Lines Plant In Gdynia In The Period From January 1, 2026. - December 31, 2027