1. An apparatus for carrying out repair, maintenance or testing of components in a hot cell, comprising at least one central, controllable manipulator, a plurality of controllable side manipulators, a T-shaped support vehicle, an equipment table, a monitoring device and a control computer, said central manipulator being arranged in the hot cell and mounted so as to be capable of horizontal and vertical travel and also of rotary or pivotal movement, said central manipulator being arranged to cooperate with each of said side manipulators, said side manipulators being capable of horizontal travel, said side manipulators being arranged in a plurality of vertically spaced planes, said monitoring device being capable of ascertaining the position coordinates of damage or defect zones, said monitoring device being in communication with said computer such that said ascertained position coordinates can be fed into said computer, said computer being situated outside the hot cell and being connected by means of control lines to said central manipulator and said side manipulators, said central manipulator being mounted on said T-shaped support vehicle, said T-shaped support vehicle comprising a transverse support and a vertical column centrally supporting said transverse support, said transverse support being capable of horizontal travel with respect to a wall of the hot cell, said vertical column being capable of horizontal travel with respect to a floor of hot cell, said support vehicle additionally comprising at least one support arm on which said central manipulator is mounted, said equipment table being mounted on said vertical column of said support vehicle within reach of said central manipulator, said equipment table being designed to accommodate tools, replacement parts and materials required for carrying out repair and maintenance work in a position such that said tools, replacement parts and materials can be manipulated by said central manipulator.