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concentric
anisotropic
spiralling
corrugation
semicircles
helical
corrugations
turbomachinery
isotropic
rifling
spirally
circulations
ellipticity
hyperboloid
circumradius
ducts
centrifugal
spiralled
time spiral
wormholes
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GIF 动图
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saturn's rings
concentric
saturn rings
anisotropic
spiralling
semicircles
spirally
ellipticity
corrugations
spirals
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concentric
spiral background
spiralling
corrugation
saturn's rings
helical
spirally
saturn rings
anisotropic
time spiral
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helical
spline
spiralling
anisotropic
splines
isotropic
corrugation
corrugations
extrusion
strigulated
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corrugations
corrugation
corrugated sheet
helical
slinky
corrugated
steel pipes
turbomachinery
aluminio
conduit
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helical
corrugations
extrusion
corrugation
extrusive
strigulated
whirls
fibers
spirally
nanowires
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corrugations
corrugation
corrugated sheet
corrugated
steel pipes
turbomachinery
concrete pipe
industrial tubes
wall tunnel
steel pipe
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anechoic
anisotropic
corrugations
concentric
spiralling
spiral background
spirals
panopticon
helical
corrugation
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waves circles
wavelet
rippled
vortices
helical
wave pattern
rippling
corrugation
spiral pattern
ripples
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concentric
spiral background
spiral pattern
time spiral
spiralling
vortex
toroidal
waves circles
spiraled
spiral
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spiralling
concentric
anisotropic
spirals
wavefronts
helical
extrusion
spirally
spiral background
undulated
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corrugation
concentric
anisotropic
corrugations
helical
corrugated
strigulated
spiralling
splines
corrugated sheet
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semicircles
concentric
anisotropic
corrugations
ellipticity
corrugation
ellipsometry
sphericity
ellipses
saturn rings
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concentric
spiral background
spiralling
helical
spirally
anisotropic
time spiral
corrugation
spiraled
spirals
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concentric
helical
extrusion
concrete pipe
anechoic
rifling
spiral background
spiralling
corrugation
anisotropic
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corrugations
corrugation
splines
anthracite
extrusions
monochromes
velodromes
ferrite
lines
lignes
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semicircles
anisotropic
photograms
helical
fresnel
isotropic
heliograph
wavelet
wavefronts
light patterns
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anisotropic
concentric
spiral background
corrugation
spiralling
abstract backgrounds
helical
parametric
background abstract
isotropic
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anisotropic
spiral background
concentric
isotropic
helical
splines
ellipticity
wavefronts
parametric
spiral pattern
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corrugation
corrugations
quonset
falkirk wheel
corrugated sheet
curvatures
industrial tubes
helical
turbomachinery
steel pipes
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zigzag background
lineation
lines
zigzagged
lignes
light patterns
zigzag
anisotropic
corrugations
interference