... consistent.4. The material: (1). Fundation: channel beam(2). The rail of the carrester: Q235, 55Q5. Usage: used to stop the ... mine car and prevent the mine car from sliding down and mine disaster accident.6. scope of business: ... flat bed car, material car, wheel sets, mining steel rail, fishplate, rail nuts, rail cutting machine, rail drilling machine, rail bender, rail track jack, and etc.