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handheld electric megaphone
tellurometer
condenser microphone
turbo jet engine
horn loudspeaker
micrometer
electric megaphone
oxygen cylinder
patent motor car
radiophone
magnetotail
atgm
heliograph
exhaust system
trumpet valve
spectroscope
zonophone
instrument trumpet
submunition
hydrophones
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handheld electric megaphone
tellurometer
condenser microphone
turbo jet engine
horn loudspeaker
micrometer
electric megaphone
oxygen cylinder
patent motor car
radiophone
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combustor
turbo jet engine
sidevalve
jet engine
aircraft engine
wind engine
plane engine
turbojet
autoclave
carburetor
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aerial passenger line
tensegrity
live broadcast antenna
radio antenna
transmission mast
radio masts
radiometers
quipu
transmitter
radiometer
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measuring bell
thermostatic
siphoning
beer dispenser
kitchenaid
gas bottle
pinard
altar bell
grundfos
vintage kitchen
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suction nozzles
pipework
turbo jet engine
precipitators
camshafts
pressure pipes
rearming
geoducks
buntline
pressurizer
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bell plate
antique singing bowls
horn loudspeaker
particular bell
singing bowl
brass tea strainer
field drum
cooking pot
round tin can
ancient singing bowls
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brake mechanism
wheel hub
galvanometer
brake system
sidevalve
piston valve
rotary valves
design of the rims
patent motor car
bell plate
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concrete pipe
trunnion
drainage pipes
ventilation pipe
sewer pipes
rifling
tunnelling
conduit
cylinder
pressure pipes
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fokker dr 1
fokker dr1
instrument panel
film projector
heinkel
fluoroscope
curtiss
twin-lens reflex
combustor
the interior of the cockpit
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portable tripod
heliograph
tripod head
camera tripod
manfrotto tripod
camera illustration
tripod ball head
photo equipment with full-size
cinematograph
telescoping
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handheld electric megaphone
submunition
gas grenade
brake buffer stop
drill hammer
nebelwerfer
site camera gun
telephone handset
micrometer
mantlet
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turbo jet engine
plane engine
aircraft engine
jet engine
nosewheel
main landing gear
thrust print
nose wheel
turboprops
turbofan
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centrifuge
turbofan
bathysphere
stratocruiser
centrifugal
turbo jet engine
turbina
stratojet
turbomachinery
quonset
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twin lens reflex
twin-lens reflex
stereoscope
analog camera
microfilming
lubitel 2
vintage camera
movie camera
film projector
6x9 film camera
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radio device
radio set
tube radio
portable radio
radiophone
transmitter
heathkit
radio for car
telefunken
radio
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micrometer
thermostatic
laryngoscope
vintage cork screw
trumpet valve
transverse flute
a pistol shaped gland
medical instrument
piston valve
instrument trumpet
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radio device
seismometer
galvanometer
radiophone
portable radio
kinematograph
gravimeter
radio set
radiotelegraph
heathkit
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film projector
gravimeter
microfilming
calorimeter
kinematograph
photolithographic
galvanometer
projectionists
cinematograph
agfa isolette
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gramophone record
cable reel
magnetic tape
exhaust fan
thunberg's fan maple
fan leaf
gramophone
phonograph record
horn loudspeaker
autoclaves
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minigun
exhaust system
cart transparent
instrument trumpet
ballista
field gun
spectrometer
car exhaust
site camera gun
drive axle