英文關鍵字
alignment
assembly
automotive
background
black
blue
button
closeup
construction
copper
custom
detail
drill
engine
engineering
equipment
factory
hand
hands
industrial
industry
job
line
machine
manufacture
manufacturing
mechanic
mechanical
metal
metallic
modern
motor
new
old
part
plant
power
press
production
repair
safety
service
soviet
starter
steel
technology
tool
transport
transportation