Fluorinated lubricants comprising \u201cpour point depressant\u201d additives of structure:X1\u2014Onmpq\u2014X2\u2003\u2003wherein X1, X2, have formula \u2014zCF3 wherein z is an integer from 0 to 3; n is an integer between 1 and 200; m is an integer between 0 and 200; p, q are integers between 0 and 10; \u22660. The support device is coupled to the actuator component while power is supplied to the electromagnet and decoupled from the actuator component while power is not supplied to the electromagnet. The ballast stay is thermally welded to the bottom to stiffen the bottom to make the air cushion stably placed on the ground. The task is allocated to one of the general-purpose processor group and the accelerator group that is judged to be lower as a result of the cost comparison.