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fire tower
34 meters high
transmission tower
transmission mast
antenna tower
rope ladder
steel tower
communications tower
observation tower
lookout tower
radio tower
steeplejack
steel scaffolding
cable-stayed bridge
high voltage pylon
bungee
transmitter
pylon
construction pole
ladders
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GIF 动图
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fire tower
34 meters high
transmission mast
transmission tower
antenna tower
rope ladder
tensegrity
observation tower
communications tower
steel tower
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wind power generator
transmission mast
suvero
rotor blade
whirligig
transmission tower
whirligigs
wind generator
load crane
cable-stayed bridge
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high wheel
ferris wheel
whirligig
windpump
spinning wheel
paddlewheel
tensegrity
whirligigs
windshaft
rim of wheel
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cable-stayed bridge
transmission tower
transmission mast
antenna tower
communications tower
anzac bridge
tensegrity
ravenel bridge
observation tower
electricity pylon
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transmission tower
aerial lift bridge
gantry crane
transmission mast
electricity pylon
gantries
high voltage pylon
gantry
draglines
megastructures
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fire tower
lookout tower
steel tower
aerial lift bridge
ironworkers
observation tower
watch tower
steeplejack
34 meters high
transmission tower
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fire tower
lookout tower
watch tower
steel tower
observation tower
lifeguard tower
communications tower
antenna tower
transmitter
radio tower
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spaceframe
roof truss
steel scaffolding
scaffolds
falsework
wooden frame construction
superstructure
steelwork
underframe
rope ladder
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skybridge
brug
aerial lift bridge
crossbeams
bridged
gantries
bridge - building structure
bridge
standbridge
underframe
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gantry crane
cable-stayed bridge
shipping crane
the large crane
load crane
bridge - building structure
container crane
aerial lift bridge
underframe
danger overhead crane
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fire tower
lookout tower
observation tower
steel tower
steel scaffolding
aerial lift bridge
transmission tower
rope ladder
steelwork
headframe
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observation tower
lookout tower
fire tower
steel scaffolding
steelwork
watch tower
ironworkers
steel stairs
scaffolds
steel tower
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transmission tower
cable-stayed bridge
transmission mast
electricity pylon
bridge - building structure
aerial lift bridge
high voltage pylon
wire frame
tensegrity
roof truss
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transmission tower
pylon
high voltage pylon
electricity pylon
hvdc
transmission mast
electric tower
cable-stayed bridge
electricity pylons
the energy tower
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gantry crane
aerial lift bridge
draglines
load crane
transmission tower
transmission mast
the large crane
wireline
harbor crane
shipping crane
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steel construction
structural steel
cable-stayed bridge
construction pole
steel tube
crossbeams
structure silhouette
crow in silhouette
ironworker
high voltage pylon
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transmission tower
high voltage pylon
electricity pylon
transmission mast
powerline
high voltage line
electric tower
aerial passenger line
electricity pylons
transmitter
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cable-stayed bridge
transmission mast
transmission tower
electricity pylon
high voltage pylon
antenna tower
power pole
arresters
high voltage line
high-voltage power lines
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high voltage pylon
cellular tower
transmission mast
electric tower
electricity pylon
transmission tower
antenna tower
transmitter
cell tower
power towers
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transmission mast
transmission tower
antenna tower
cellular tower
fire tower
cell tower
electric tower
radio tower
communications tower
steel tower