Request For Quotations Among Small And Medium-Sized Businesses In Electronic Form No. 1811 / Zkte-S-Kav / 23 For The Right To Conclude An Agreement For The Supply Of Electrical Materials And Electrical Appliances For The Needs Of The North Caucasus Directorate For The Operation Of Buildings And Structures - A Structural Unit Of The North Caucasian Railway - Branch Of Russian Railways (EXPIRED)