Why DC motors have open slots?

2-1-4 DC Motor With a Core Slot dc slot Modular design, with DC-DC module cards Can be 5 slot output for MP450650, 7 slot output for MP1k0 75W100W150W210W dc auto slot Location Thomas Jefferson Building 10 First Street SE Washington, DC 20540 · Accessibility Library of Congress buildings are fully accessible Please indicate

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