sentences:  The guns are usually deployed in batteries of six to eight guns; promotional material claims that a battery can place more than 1 tonne of projectiles on a target in one minute.In Russian service, the gun is usually towed by a KrAZ-260 9 tonne 6×6 truck or by an artillery tractor, such as the AT-T, ATS-59, AT-S, or MT-T.When towed the carriage is supported by a four-wheel (two wheels on each side) walking beam suspension, permitting the gun to be towed over rough terrain at speeds up to 30 km/h (18.6 mp/h).