英文關鍵字
sandblasting
sandblaster
steel
pressure
blast
sand
industry
removal
rust
sandblast
technology
preparation
equipment
dust
dirty
worker
construction
production
factory
manufacturing
suit
iron
protection
abrasive
cleaning
nozzles
remove
part
grit
air
helmet
industrial
blasting
man
mask
metal
sanding
metallurgical
furnace
surfaces
room
shot