英文關鍵字
background
bubble
chemistry
closeup
cold
construction
control
duct
energy
engineering
filter
filtering
flask
food
gas
gauge
indication
industry
instrument
laboratory
level
liquid
manufactory
manufacturing
measurement
modern
monitoring
nobody
oil
pipe
piping
plant
power
pressure
process
pump
reservoir
rotation
scale
sensor
stainless
steel
system
tank
trumpet
tub
tube
undertaking
workshop