Heavy cranes of soviet origin mounted on tracked or wheeled chassis tended to have a designation starting with KS. The numerical suffix appeared to be arbitrarily allocated.
VARIANTS OF THE SERIES
KS-3575 - Based on ZiL-133 chassis. KS-2573 - Crane based on Ural-375 chassis. KS-2573-2 - Crane based on Ural-4320 chassis. KS-3574 - Crane based on Ural-4320 chassis. KS-5571 - MAZ-543 basaed heavy crane. KShT-50-MZKT-6923 - Crane based on MZKT-6923 chassis.