英文關鍵字
backroom
basement
beaker
bucket
chemistry
container
corner
dark
dimmed
dressuniform
engineer
engineering
environment
equipment
factory
fillin
filtering
filters
filtration
glassvare
gloves
green
industrial
industry
lab
laboratory
light
liquid
operator
pipe
pipeline
placed
plastic
pouring
processing
protection
purification
routine
science
steel
table
tank
technology
tubes
uniform
water
wearing
white
worker
zinc