機器
abandoned
actuator
assembly
blue
closeup
component
cooling
design
device
electric
electrical
electricity
energy
engine
engineering
equipment
factory
gear
generator
gray
heavy
horizontal
industrial
industry
machinery
manufacturing
metal
motor
new
nobody
objects
old
part
pipe
plant
power
powerful
rust
rusty
science
steel
technology
threephase
tube
vintage
voltage
wire