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Current hierarchy for hardware (234)
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hardware (234) hardware (234) exclude
  belt couplings (3) hardware (234) -> belt couplings (3)  
  chains and chain links (1) hardware (234) -> chains and chain links (1)  
  clasps and fastenings (2) hardware (234) -> clasps and fastenings (2)  
  door springs (2) hardware (234) -> door springs (2)  
  fasteners (40) hardware (234) -> fasteners (40) exclude
    nails (9) hardware (234) -> fasteners (40) -> nails (9)  
    nuts and bolts (3) hardware (234) -> fasteners (40) -> nuts and bolts (3)  
    rivets (13) hardware (234) -> fasteners (40) -> rivets (13)  
    screws (13) hardware (234) -> fasteners (40) -> screws (13)  
  faucets (10) hardware (234) -> faucets (10)  
  gaskets and seals (2) hardware (234) -> gaskets and seals (2)  
  hinges (17) hardware (234) -> hinges (17)  
  hose couplings (3) hardware (234) -> hose couplings (3)  
  knobs (2) hardware (234) -> knobs (2)  
  latches (3) hardware (234) -> latches (3)  
  locks (22) hardware (234) -> locks (22)  
  nut locks (4) hardware (234) -> nut locks (4)  
  packing for joints (1) hardware (234) -> packing for joints (1)  
  padlocks (5) hardware (234) -> padlocks (5)  
  pipe hangers (1) hardware (234) -> pipe hangers (1)  
  plumbing fittings (1) hardware (234) -> plumbing fittings (1)  
  storage cabinets (5) hardware (234) -> storage cabinets (5)  
  tool holding clips (1) hardware (234) -> tool holding clips (1)  
  valves (106) hardware (234) -> valves (106)  
  window sashes (3) hardware (234) -> window sashes (3)  
 
Full Hierarchy | agricultural (3,200) | armaments (131) | combination tools (620) | construction machines (88) | electrical devices (1,367) | gauges (109) | handheld power tools (811)
hardware (234) | household tools (118) | household (2,221) | industrial machines (1,905) | industrial tanks (5) | industrial tools (1,245) | knives and cutters (176) | layout tools (2,652)
manufacturing (315) | material handling (385) | metalworking machines (14,928) | metalworking tools (2,024) | musical instruments (39) | photographic apparatus (325) | pliers (730) | potters tools (3)
propulsion and energy (6,164) | punches (49) | rules (496) | screwdrivers (569) | specialty machines (2,563) | specialty tools (1,594) | stoneworking (137) | structures (117)
tool making (463) | trade specific (5,943) | transportation (1,040) | water distribution systems (227) | woodworking machines (15,588) | woodworking tools (4,172) | work holding (1,625) | wrenches (5,972)

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