英文關鍵字
and
below
bulldozer
career
caterpillar
combine
crushes
development
digging
energy
engineering
enrichment
enterprise
excavator
factory
from
frost
giant
going
heavy
hits
industry
iron
knots
labor
machine
machinery
mine
miner
mining
ncloseup
open
outdoors
parts
production
profession
quarry
rear
rides
road
rocks
rope
size
soil
sorting
stone
stones
technique
through
tipper
tractor
useful
view
volume
winter