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digital safe
betacam
preamps
electricity meter
control panel
heathkit
digital bi-amp powered loudspeaker
fusebox
radio cassette
preamp
uninterruptible power supply
preamplifier
videocassettes
audio mixer
radio device
power supply
casette tape
revox
transceiver
switchboard
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图片
GIF 动图
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digital safe
control panel
electricity meter
preamplifier
preamps
sansui
ampex
heathkit
radio device
digital bi-amp powered loudspeaker
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casette tape
radio cassette
audiocassette
compact cassette
audio cassette
ampex
microcassette
audiocassettes
stereo system
cassette tape
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videocassettes
audiocassettes
audiocassette
microcassette
videocassette
audio cassette
radio cassette
compact cassette
cassette
musicassette
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powerpc
alphaserver
rackmount
microdrives
eproms
optical drive
microcomputers
netpc
microcomputer
the server room
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ceiling ventilation
ductwork
duct
exhaust fan
main landing gear
ceiling construction
concrete ceiling
switchgear
elevators
ventilation grille
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radio cassette
digital safe
microcassette
videocassettes
sound recorder
radio device
audiocassette
minidv
audiocassettes
casette tape
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multimeters
control panel
controls
autoclave
voltmeter
electrometer
instrument panel
rheostat
heathkit
altimeters
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ampex
oscilloscopes
tektronix
arpanet
heathkit
control panel
synclavier
radiophonic
chromatograph
sequencers
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oscilloscopes
betacam
control panel
control desk
ampex
oscilloscope
radar equipment
controls
arpanet
stereo system
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tube radio
preamplifier
digital safe
digital bi-amp powered loudspeaker
focusrite
radio cassette
heathkit
preamplifiers
preamps
control panel
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preamps
oscilloscopes
transceiver
ampex
heathkit
sound recorder
preamplifier
stereo system
transceivers
radio cassette
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qrp
oscilloscope
oscilloscopes
heathkit
shortwave
tube radio
tektronix
multimeters
radio device
radio for car
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control panel
switchgear
controls
compressors
electricity meter
oscilloscopes
overcurrent
arpanet
oscilloscope
control desk
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control panel
electrometer
heathkit
switchboard
electricity meter
controls
transmitter
oscilloscope
switchboards
rectifiers
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brazing
gas welder
annealing
degaussing
band saw
electricity transformer
welder
contactor
electronic waste
workpiece
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computer room
control desk
the server room
radiotelevisione
radiodiffusion
ultrasparc
rackmount
tektronix
laboratory
microfilms
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battery terminals
footplate
brake mechanism
voltage regulator
presser foot
battery explosion
solenoids
contactors
sensor cleaning
contactor
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preamplifier
preamps
digidesign
ampex
audio mixer
preamplifiers
amplifiers
audio interface
mixing board
compressors
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subcabinet
switchgear
transmitter
control desk
control panel
digital safe
switchboard operator
switchboards
switch cabinet
rackmount
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ampex
heathkit
dvd buttons
audiocassettes
microcassette
vcr
preamplifier
videodisk
nakamichi
videocassettes