英文關鍵字
bark
chainsaw
chip
close
cutting
danger
day
electric
energy
engine
environment
equipment
forest
forester
industry
job
log
lumberjack
machine
motion
nature
object
occupation
outdoors
power
progressive
rural
saw
sawdust
scan
section
sharp
stump
timber
tool
tree
tripod
woods
work
worker
working