英文關鍵字
silver
ore
bolivia
mineral
rock
mining
industry
machinery
equipment
machine
quartz
fortune
hunt
travel
destination
andes
mountains
industrial
refine
pure
potosi
stone
metallic
precious
metal
greed
value
gray
aggregate
shiny
luxury
material
grey
expensive
rich
wealth
tourism
digger
success
background
heavy
investment
texture
processing
dangerous
excavation
geology
exploitation
process
close
cero
rico
town
high
altitude
highlands