機器
accuracy
business
cogs
cogwheel
conceptual
connection
construction
cooperation
development
device
element
energy
engine
engineering
equipment
gears
group
illustration
industrial
industry
joint
mechanical
mechanism
metallic
motor
nobody
objects
old
pinion
power
project
relationship
rotate
shiny
sketch
sprocket
stainless
technology
teeth
togetherness
tools
transmission
turning
unique
wheel
work