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