CPC Subgroup
E01B 27/04 Removing the ballast; Machines therefor, whether or not additionally adapted for taking-up ballast (E01B27/06, E01B27/12 takes precedence; redistributing ballasting material E01B27/02)
Full Title
Placing, renewing, working, cleaning, or taking-up the ballast, with or without concurrent work on the track; Devices therefor; Packing sleepers > Removing the ballast; Machines therefor, whether or not additionally adapted for taking-up ballast (E01B27/06, E01B27/12 takes precedence; redistributing ballasting material E01B27/02)