Carbon steel sheets and plates used in track equipment machinery. Assortment (restrictions as per GOST 19903-74 GOST 19904-74, GOST 7118-78, GOST 7419.4-78, GOST 103-76, GOST 8568-77, GOST 21427.3-75 and GOST 17718-72, GOST 1127-72, GOST 2283 -79, GOST 3560-73).