機器
centrifugal
compressor
cross
design
detail
device
energy
engine
engineering
equipment
factory
fan
flat
flow
gear
historic
impeller
industrial
industry
inside
iron
machinery
manufacturing
mechanical
metal
oil
old
part
pipe
plant
power
powertrain
pressure
pump
rusty
science
screws
section
shaft
steel
system
technology
transportation
truck
turbine
tyre
valve
vane
wheel
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