英文關鍵字
car
cart
close
coal
construction
copy
earth
equipment
factory
fossil
full
heavy
huge
industrial
industry
infrastructure
katowice
large
machine
machinery
material
mean
metal
mine
mineral
museum
open
ore
pile
pit
plant
poland
polish
rock
sign
silesia
sky
space
steel
symbol
technology
transport
transportation
turn
underground
yellow