... high effectively These serial electric motors may be applied to low-speed (tube-shaped) and middle-speed ( ... grinder, or other motors being similar drag characteristic to form a complete machine set.Most of this ... be break-down appearance and running reliably;as to the copper-bar squirrel cage rotor, it will ... models,i,e. rooling type and sliding type, how to select ,it must be in accordance with motor's ...