英文關鍵字
assembly
background
blender
business
car
chemical
chrome
cistern
closeup
construction
control
crankshaft
cylinder
electricity
engine
engineering
equipment
factory
food
glossy
indoor
industrial
industry
machine
machinery
manufacture
manufacturing
mechanical
metal
modern
motor
moving
performance
piston
plant
power
precision
process
product
production
rotation
shiny
steel
technology
transport
transportation
valve
work
workshop