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exhaust fan
ventilation grid
ventilator
ventilation grille
evaporator
duct
autoclave
air vent
ceiling ventilation
cooling tower
turbofans
superheater
ventilation
turbomachinery
combustor
autoclaves
dehydrator
centrifugal
grill grate
parabolic mirror
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图片
GIF 动图
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exhaust fan
ventilation grid
ventilator
tokamak
ventilation grille
evaporator
autoclave
duct
fresnel
turbofan
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stereographic
porthole
stargate
centrifugal
tokamak
portholes
panopticon
photosphere
levator
hyperspace
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old clock
ship's wheel
tower clock
astronomical clock
station clock
clock face
grandfather clock
clock
centrifugal
magnetic compass
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ventilation grille
metal grille
grill grate
evaporator
louvered
radiators
ventilation grid
cooling tower
radiator
exhaust fan
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centrifugal
tokamak
round frame
centriole
round window
rotating beacon
circulations
reticle
portholes
cardioid
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incandescent lamp
fresnel
revolving light
halogen bulb
light bulb
turbofan
ceiling light
turbina
halogen light
turbomachinery
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radiator
radiators
vent
ventilation grille
corrugated
helical
louvered
ventilation pipe
fluted
condenser
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arcology
morphosis
monolithic
megastructure
multi storey car park
abstract corporate
superstructure
neogothic
fractalius
triforium
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corrugated
radiators
condensers
corrugation
corrugations
evaporator
ducts
anisotropic
ventilation grille
ventilation grid
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lattice window
window with grille
lattice windows
window with shutters
metal grille
slat window
windowpane
underexplored
raciness
windowpanes
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ventilation grille
metal grille
strainer
steel mesh
corrugations
grill grate
condenser
grate
ventilation grid
grillwork
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ventilator
hyperboloid
exhaust fan
fresnel
fan leaf
helical
centrifugal
wicker basket
turbofan
turbofans
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fresnel
stroboscope
microfilmed
microfilm
coronagraph
retroreflector
heliograph
fluoroscope
microfilming
porthole
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levator
metallic door
steel door
elevators
vault
conduit
room door
glass window
passthrough
lubitel 2
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underexplored
fresnel
facade lantern
headlight
ceiling
streetlamp
ceiling light
streetlight
the ceiling
round window
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exhaust fan
turbofans
magnetic tape
stroboscope
underexplored
impeller
turbina
rifling
anisotropic
fluoroscope
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windshaft
precipitator
imprisoning
precipitators
panopticon
safecracker
airlock
porthole
clockmaker
transmitter
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radiator
ventilation grille
metal grille
motor screen
radiators
concertina
mbira
autoharp
condenser microphone
evaporator
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blinds
light patterns
miniblinds
ventilator
blue lamp
window blinds
blue light
shutters
slat window
radiator
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ventilator
fresnel
ventilation grille
incandescent lamp
halogen bulb
light-alloy rim
combustor
metal grille
aluminium rim
dehydrator