Diesel snow blowers of the SBB of three generations showed to the public during the open door days in the industrial work of the SBB in Biel, to celebrate 175 years railways in Switzerland. From left to right: Theeaxle Xrotm 2/3 # 98 built by SLM in 1967 for the Gotthard line. Fouraxle Xrotm 4/4 # 96 with 1000 HP built by Beilhack in 1982 for the Gotthard line and based in Erstfeld, just turning 180 degrees on the frame. Small XTm # 109 (99 85 9491 109) built by RACO and Beilhack in 1968.