Milling machines; milling centers, namely, machining centers; milling cells; double-spindle milling machines; multiple-spindle milling machines, with integrated loading and unloading devices and tool changing devices, in particular for machining prismatic parts and for optionally machining rotationally symmetrical contours; machining centers with numerically controlled linear and rotary or pivot axes; machine tools having a tool-carrying work spindle driven in rotation; machine tools having a...