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Current hierarchy for electrical devices (681)
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electrical devices (681) electrical devices (681) exclude
  electric arc lamps (16) electrical devices (681) -> electric arc lamps (16)  
  electric batteries (9) electrical devices (681) -> electric batteries (9) exclude
    battery charging devices (4) electrical devices (681) -> electric batteries (9) -> battery charging devices (4)  
  electric distribution systems (4) electrical devices (681) -> electric distribution systems (4)  
  electric generators (25) electrical devices (681) -> electric generators (25)  
  electric motors (552) electrical devices (681) -> electric motors (552) exclude
    AC motors (23) electrical devices (681) -> electric motors (552) -> AC motors (23)  
    DC motors (9) electrical devices (681) -> electric motors (552) -> DC motors (9)  
    centrifugal motor switches (12) electrical devices (681) -> electric motors (552) -> centrifugal motor switches (12)  
    electric motor making (17) electrical devices (681) -> electric motors (552) -> electric motor making (17)  
    electrical insulation (1) electrical devices (681) -> electric motors (552) -> electrical insulation (1)  
    gear motors (7) electrical devices (681) -> electric motors (552) -> gear motors (7)  
    induction motors (117) electrical devices (681) -> electric motors (552) -> induction motors (117) exclude
      capacitor start induction motors (1) electrical devices (681) -> electric motors (552) -> induction motors (117) -> capacitor start induction motors (1)  
      repulsion start induction run motors (49) electrical devices (681) -> electric motors (552) -> induction motors (117) -> repulsion start induction run motors (49)  
      shaded pole induction motors (4) electrical devices (681) -> electric motors (552) -> induction motors (117) -> shaded pole induction motors (4)  
    motor armatures (19) electrical devices (681) -> electric motors (552) -> motor armatures (19)  
    motor bearings (19) electrical devices (681) -> electric motors (552) -> motor bearings (19)  
    motor brakes (2) electrical devices (681) -> electric motors (552) -> motor brakes (2)  
    motor brush holders (15) electrical devices (681) -> electric motors (552) -> motor brush holders (15)  
    motor brushes (4) electrical devices (681) -> electric motors (552) -> motor brushes (4)  
    motor commutators (5) electrical devices (681) -> electric motors (552) -> motor commutators (5)  
    motor controls (34) electrical devices (681) -> electric motors (552) -> motor controls (34)  
    motor cooling (26) electrical devices (681) -> electric motors (552) -> motor cooling (26)  
    motor housings (7) electrical devices (681) -> electric motors (552) -> motor housings (7)  
    motor mounts (18) electrical devices (681) -> electric motors (552) -> motor mounts (18)  
    motor regulators (11) electrical devices (681) -> electric motors (552) -> motor regulators (11)  
    motor stators (7) electrical devices (681) -> electric motors (552) -> motor stators (7)  
    motor windings (9) electrical devices (681) -> electric motors (552) -> motor windings (9)  
    repulsion motors (1) electrical devices (681) -> electric motors (552) -> repulsion motors (1)  
    universal motors (2) electrical devices (681) -> electric motors (552) -> universal motors (2)  
  electric switches (33) electrical devices (681) -> electric switches (33)  
  magnetic transducers (1) electrical devices (681) -> magnetic transducers (1)  
  phase regulators (1) electrical devices (681) -> phase regulators (1)  
 
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hardware (2) | household machines (488) | household tools (792) | household (377) | industrial furnaces (27) | industrial machines (689) | industrial tools (334) | knives and cutters (125)
layout tools (2,427) | metalworking machines (6,132) | metalworking tools (773) | musical instruments (3) | pliers (687) | potters tools (3) | propulsion and energy (3,078) | punches (42)
rules (423) | screwdrivers (434) | specialty machines (1,225) | specialty tools (721) | stoneworking machines (51) | structures (72) | tool handles (91) | tool holders (69)
tool making (281) | tool storage (51) | trade specific (5,030) | transportation machines (277) | transportation tools (18) | water distribution systems (102) | woodworking machines (14,244) | woodworking tools (3,780)
work holding (1,157) | wrenches (5,698)

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