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radio device
seismometer
galvanometer
kinematograph
radiophone
gravimeter
portable radio
radio set
radiotelegraph
spectrometer
spectrophotometer
transmitter
heathkit
seismograph
electrometer
photometer
radar equipment
measuring device
fluoroscope
radiocommunication
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GIF 动图
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radio device
seismometer
galvanometer
radiophone
portable radio
kinematograph
gravimeter
radio set
radiotelegraph
heathkit
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radio set
radio cassette
stereo system
tube radio
radio device
radio
transmitter
radiotelevision
radiotelevisione
radios
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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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seismometer
hydrophone
radiophone
theremin
seismograph
galvanometer
sound table
acousmatic
electroacoustics
radio set
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examination room
treatment room
kinetoscope
kinescope
guardroom
consulting room
rietveld
administation
vandercook
dumbwaiter
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radio device
radio set
tube radio
portable radio
radiophone
transmitter
heathkit
radio for car
telefunken
radio
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film projector
gravimeter
microfilming
calorimeter
kinematograph
photolithographic
galvanometer
projectionists
cinematograph
agfa isolette
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enlarger
agfa isolette
photo equipment with full-size
filmtec
photolithographic
microfilmed
mimeograph
photolithography
lubitel 2
film projector
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switchboards
computer room
switchboard
electronic records
microcomputers
heathkit
the server room
radioteletype
computer system
control desk
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computer room
control desk
transmitter
usnr
control panel
engine room
radiopharmaceutical
radar equipment
switchboard
switchboards
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theodolite
photo equipment with full-size
surveying equipment
gravimeter
kinematograph
radar equipment
theodolites
radiotelegraph
photometer
heliograph
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microfilming
microfilm
microfilmed
microfilms
microfiche
galvanometer
radio device
gravimeter
heathkit
kinematograph
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radioteletype
teletype
heathkit
teletypewriter
microtome
spectrophotometer
microfilmed
microfilm
ampex
kinematograph
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digital camera
filming equipment
analog camera
photo equipment with full-size
twin-lens reflex
film camera
paxina camera
camera equipment
zenit camera
photometer
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mimeograph
phototypesetting
radioteletype
gestetner
analog camera
teletype
microfilmed
spectrophotometer
teleprinter
film projector
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heathkit
preamplifier
preamplifiers
radiotelevision
radio device
marantz
telefunken
tube radio
oscilloscope
ampex
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radio device
portable radio
tube radio
heathkit
radiotelephone
radio for car
transmitter
radioteletype
radio set
transistorized
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chemical laboratory
radiophonic
laboratories
laboratory
cleanrooms
tektronix
laboratory information
storeroom
radioteletype
microfilmed
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oscilloscope
oscilloscopes
radio device
radiocommunication
shortwave
radiosonde
portable radio
tektronix
radiocommunications
heathkit
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radioteletype
microfilms
teletype
microfilm
teleprinter
duplicators
mailroom
vandercook
gestetner
laserwriter