英文關鍵字
background
boiler
bubble
chemical
chemistry
closeup
conduit
construction
control
dairy
energy
engineering
factory
filter
flask
gauge
indication
industry
instrument
laboratory
level
liquid
manufacturing
measurement
modern
oil
pipe
pipeline
piping
plant
power
process
pump
refrigeration
reservoir
rotation
scale
sensor
stainless
steel
system
tank
technology
transmission
transportation
trumpet
tube
water
workshop