| 摘要 |
Apparatus comprising an undercutter portion for excavating ballast material from a ballast bed and a conveyor portion for conveying the excavated ballast material to a discharge zone, wherein there is provided an endless chain structure adapted to move along a path which includes the undercutter portion and the discharge portion, the endless chain structure defining part of the undercutter portion and the endless chain structure further defining part of the conveyor portion. QO w *1h |
