機器
abstract
background
black
bond
bonding
car
clockwork
cog
cogwheel
concept
conceptual
connect
connection
design
dirty
drive
engine
engineering
equipment
gear
gearbox
gearing
gears
idea
industrial
industry
interlocked
iron
machinery
mechanical
mechanics
mechanism
metal
metallic
metaphor
motor
nobody
objects
old
parts
power
precision
rust
shaft
shiny
steel
teamwork
technology
teeth
together
transmission
wheel