英文關鍵字
autumn
axe
bark
beech
blade
block
calorific
chop
chopping
cold
countryside
cut
cutting
energy
fagus
firewood
flammable
forest
forestry
fuel
hardwood
iron
log
logs
lumberjack
man
manual
materials
metal
motion
natural
nature
october
outdoors
pile
raw
rural
sawdust
september
slow
stump
summer
timber
tool
tree
value
winter
wood
woodfuel
worker
yard