| 摘要 |
Railway ballast machine (10) for tunnels which is able to renew the railway road bed (27) in tunnels and comprises a scarifier (24), a riddle (19) and means (20) to spread the material retained, such machine (10) including a work unit (14) together with a scoop casing (35) unit (16) to remove metalling and a unit (15) to grip the rails, the metalling (27) being removed by being lifted through empty spaces in the railway line. |
