英文關鍵字
anhydrite
background
boiler
chemical
chemistry
chrome
closeup
collection
composed
compressor
concept
concrete
construction
cooling
daytime
detail
electric
energy
engineering
facility
factory
generator
heavy
hose
hoses
hydraulic
indifferent
industrial
industry
iron
line
machine
machinery
materials
mechanical
metal
metallic
modern
new
oil
pipe
pipes
piston
plan
power
production
real
shot
slowmotion
station
steel
structure
systa
technology
transformer
valve
valves
vehicle
wire
work