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Current hierarchy for hardware (230)
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hardware (230) hardware (230) exclude
  belt couplings (3) hardware (230) -> belt couplings (3)  
  chains and chain links (1) hardware (230) -> chains and chain links (1)  
  clasps and fastenings (2) hardware (230) -> clasps and fastenings (2)  
  door springs (2) hardware (230) -> door springs (2)  
  fasteners (38) hardware (230) -> fasteners (38) exclude
    nails (9) hardware (230) -> fasteners (38) -> nails (9)  
    nuts and bolts (3) hardware (230) -> fasteners (38) -> nuts and bolts (3)  
    rivets (12) hardware (230) -> fasteners (38) -> rivets (12)  
    screws (12) hardware (230) -> fasteners (38) -> screws (12)  
  faucets (9) hardware (230) -> faucets (9)  
  gaskets and seals (2) hardware (230) -> gaskets and seals (2)  
  hinges (17) hardware (230) -> hinges (17)  
  hose couplings (3) hardware (230) -> hose couplings (3)  
  knobs (2) hardware (230) -> knobs (2)  
  latches (3) hardware (230) -> latches (3)  
  locks (22) hardware (230) -> locks (22)  
  nut locks (4) hardware (230) -> nut locks (4)  
  packing for joints (1) hardware (230) -> packing for joints (1)  
  padlocks (5) hardware (230) -> padlocks (5)  
  pipe hangers (1) hardware (230) -> pipe hangers (1)  
  plumbing fittings (1) hardware (230) -> plumbing fittings (1)  
  storage cabinets (4) hardware (230) -> storage cabinets (4)  
  tool holding clips (1) hardware (230) -> tool holding clips (1)  
  valves (106) hardware (230) -> valves (106)  
  window sashes (3) hardware (230) -> window sashes (3)  
 
Full Hierarchy | agricultural (3,196) | armaments (131) | combination tools (620) | construction machines (88) | electrical devices (1,359) | gauges (109) | handheld power tools (800)
hardware (230) | household tools (118) | household (2,205) | industrial machines (1,900) | industrial tanks (5) | industrial tools (1,244) | knives and cutters (176) | layout tools (2,646)
manufacturing (315) | material handling (384) | metalworking machines (14,922) | metalworking tools (2,021) | musical instruments (38) | photographic apparatus (325) | pliers (729) | potters tools (3)
propulsion and energy (6,133) | punches (49) | rules (495) | screwdrivers (567) | specialty machines (2,557) | specialty tools (1,574) | stoneworking (137) | structures (115)
tool making (463) | trade specific (5,934) | transportation (1,037) | water distribution systems (227) | woodworking machines (15,584) | woodworking tools (4,171) | work holding (1,625) | wrenches (5,971)

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