機器
background
blur
bolt
bolts
circle
closeup
cog
cogwheel
cogwheels
energy
engine
engineering
equipment
factory
gear
hardware
industrial
industry
iron
key
keys
machinery
many
mechanic
mechanical
mechanism
metal
metallic
nut
nuts
old
part
power
pulley
repair
round
rust
rusty
screw
set
shiny
steel
teamwork
technology
texture
tool
transmission
wheel
workshop