│    └ Fuel (outdoor)
│       ├ Charcoal, firewood
│       ├ firelighter
│       ├ gas can
│       ├ white gasoline
│       ├ alcohol fuel
│       ├ solid fuel
│       ├ smoked wood
│       ├ smoke chip
│       ├ Fuel Bottle
│       └ Other outdoor fuels
│ ├ motorcycle
│ │ ├ Meters, indicators
│ │ │ └ fuel gauge
│ │ └ Tank, fuel system
│ │    ├ tank (of liquid)
│ │    ├ tank cover
│ │    ├ Tank cap
│ │    ├ Tank cap cover
│ │    ├ Tank Pad
│ │    ├ fuel cock
│ │    ├ fuel filter
│ │    ├ fuel pump
│ │    ├ fuel hose
│ └ automobile
│       ├ Engine parts
│       ├ supercharger
│       ├ Cooling system
│       └ Fuel System Parts
      └ Kitchen consumables
         └ Solid fuel for tabletop use
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