| 摘要 |
A head work wagon (1) provided at the tip or in the end the work train is provided with an excavation device (2) that excavates bottom material or ballast provided at tracks. The bottom material and ballast are conveyed from loading station of the head work wagon to rear work wagons (12,13,17,18) through conveyer (14). The new bottom material and new ballast are conveyed from rear work wagons to head work wagon through conveyer so as to construct new track. An independent claim is included for head work wagon. |
