英文關鍵字
abyss
and
back
body
bucket
bulldozer
caterpillar
closeupn
coal
collects
combine
development
digging
dump
edge
energy
engineer
engineering
enrichment
enterprise
excavator
factory
filled
frost
full
geodesy
geology
giant
going
industry
into
iron
knots
labor
ladle
machine
machinery
mine
miner
mining
mountains
moves
open
ore
outdoors
parts
precipice
production
profession
pushes
quarry
reverse
rides
rocks
rope
size
soil
sorting
spent
stones
technique
tipper
tractor
truck
useful
volume
winter