英文關鍵字
alone
backroom
beaker
chemistry
conditions
container
cylindrical
dark
dressuniform
engineer
engineering
environment
equipment
factory
fillin
filtering
filters
filtration
glassvare
gloves
industrial
industry
laboratory
large
light
liquid
operator
pipe
pipeline
plastic
processing
protection
purification
routine
rows
science
table
technology
uniform
water
wearing
white
worker
zinc