英文關鍵字
abandoned
active
architecture
beam
builder
building
construction
control
development
device
electric
empty
engine
engineering
equipment
factory
hard
helmet
industrial
industry
iron
labor
laborer
labour
light
machine
manual
manufacturing
metal
motor
nconstruction
part
power
safety
sign
skill
skilled
smoking
spark
sport
steel
technical
technology
tool
tools
warehouse
welder
welding
wheel
white
with
wooden
work
worker
working
workshop