英文關鍵字
accuracy
binding
blade
circular
construction
cut
cutter
cutting
detail
disc
engineering
equipment
factory
granite
hard
hardness
industrial
industry
job
machine
machinery
machining
manufacture
manufacturing
marble
mechanism
metal
mill
milling
mineral
power
powerful
process
production
quarry
rock
saw
sawing
sharp
steel
stone
technical
technology
tool
tooling
turning
wheel
work
workshop