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helical band
螺旋带
helical band
helical blade
helical blade stirrer
helical blower
helical Bourdon tube
helical burr
helical casing
helical cast
helical circuit
helical coil
helical compression s...
helical configuration
helical contact
helical content
helical conveyer
helical conveyer feeder
helical conveyor
helical convolute
helical curve
helical cutter
helical cutting
helical delay cable
helical density insta...
helical density wave
helical diagram
helical digger
helical discharge
helical dislocation
helical duct intake
helical element
helical eyepiece
helical fan
helical fash lamp
helical fibre
helical field
helical filter
helical fin
helical flash lamp
helical flash tube
helical flow turbine
helical flute
helical forging
helical fuse
helical gas lens
Helical Gear
helical gear cutting
helical gear hub
helical gear pump
helical gear shaft
helical gear tooth
helical gear with hel...
helical gear with jaw
helical gearing
helical gearing hypoids
helical grid
helical groove
helical guideway
helical hair spring
helical heater
helical hinge
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