BTM-3BTM-3, high-speed trench making machine.
The army used this machine for quick laying drains, ditches and trenches in the ground for categories I-IV, ie machine is able to tear a trench in the soil from the sand to frozen. It was developed in the 1970's. The machine is mounted on the base of heavy artillery tractor AT-T.
See
picture #2088 also.
Picture added on 07 September 2010 at 16:41