英文關鍵字
background
construction
energy
engineering
equipment
factory
fire
flame
foundry
heavy
industrial
industry
iron
line
machine
machinery
man
manufacture
manufacturing
material
metal
metallic
metallurgical
metallurgy
metalwork
modern
pipe
pipeline
pipes
plant
power
process
processing
product
production
rolled
round
stainless
steel
storage
structure
system
technology
tube
tubing
warehouse
work
worker
workshop