英文關鍵字
big
blade
blocks
circular
construction
cool
cut
equipment
exposures
factory
granite
hard
hardness
industrial
industry
job
machine
machinery
manufacture
manufacturing
marble
mechanical
mechanism
metal
mica
mine
mineral
object
pit
power
powerful
product
production
quarry
rock
rough
saw
sawing
sharp
sharply
steel
stone
stonework
surface
technical
technology
thick
water
wheel
work
workshop