英文關鍵字
background
building
ceramic
chemical
clean
company
construction
control
conveyor
cube
distribution
empty
energy
engine
engineering
equipment
factory
gum
indoor
industrial
industry
inside
interior
line
machine
machinery
man
manufacturing
mechanical
modern
nobody
petrochemical
plant
power
production
pump
quality
refinery
rubber
space
technology
tube
valve
work