機器
analogue
circle
close
closeup
cog
cogwheel
control
dike
dirty
energy
engine
engineering
equipment
gear
gearshift
grunge
hydro
industrial
industry
iron
large
lock
machinery
mechanic
mechanical
mechanism
metal
metallic
no people
occupation
old
outdoor
pinion
power
precision
pulley
retro
rotary
rule
rust
rusty
steel
system
technical
technology
watermill
wheel
work
working