機器
background
bonding
circle
closeup
cog
cogwheel
component
conceptual
connect
detail
disassembled
element
equipment
gear
gears
gold
group
hardware
hardwood
heavy
industrial
industry
interlocked
interlocking
linked
machinery
mechanical
mechanics
mechanism
metal
metallic
motion
old
part
power
rotate
solid
spin
steel
teamwork
technology
teeth
time
together
transmission
turn
wheel
white
worn