unity
機器
aged
arrangement
binding
blue
bolt
bonding
circle
clock
clockwork
clockworks
cog
cogs
cogwheel
connection
cooperation
engine
engineering
equipment
gear
gears
gearwheel
hardware
industrial
industry
machinery
macro
mechanical
mechanics
mechanism
metal
metallic
old
progress
reliability
retro
rotation
sprockets
teamwork
technical
technology
time
together
toned
turn
twist
watch
wheel
wheels