機器
abstract
background
blackboard
business
chalk
cogwheel
concept
cooperation
dark
design
driving
element
engineering
factory
gear
gearing
gearshift
gearwheels
gui
icon
idea
industrial
machinery
mechanical
mechanics
mechanism
motion
motor
progress
revolve
rotate
shape
sign
spin
steering
symbol
teamwork
technical
technology
tool
toothed
transfer
transmission
turn