http://www.military-today.com/engineering/mtu_72.htm The MTU-72 armored bridgelayer is a combat engineering vehicle, designed to launch an assault bridge for tanks and other military vehicles across trenches and water obstacles. It entered service with the Soviet Army in 1974. It replaced or supplemented the previous MTU-20 and MT-55 bridgelayers, based on the T-55 medium tank. More information on Military-Today.com