Заполните пропуски глаголами: "to attach", "to serve", "to rotate", "to put into operation": 1. motors to convert different forms of energy into mechanical energy. 2. when the motor is operating its armature . 3. nameplates are fo the devices' frames. 4. these two installations should simultaneously.
1. Motors serve to convert different forms of energy into mechanical energy. 2. When the motor is operating its armature rotates. 3. Nameplates are attached to the device frames. 4. These two installations should be put into operation simultaneously.