英文關鍵字
alone
backroom
basement
chemistry
container
corner
cylindric
dark
dimmed
dirty
dressuniform
engineer
engineering
environment
equipment
factory
floor
glassvare
green
hoses
industrial
industry
jacket
laboratory
large
light
liquid
machine
mounted
operator
pipeline
pipes
placed
processing
protection
rotating
routine
science
something
steel
tank
technology
top
walls
water
working
zinc