【运输】用于螺旋形打齿【运输】用于螺旋切齿

spiral ramp garage (spiral ramp car park)

insulator with spiral arcing horns

lamina spiralis ossea【解剖】;osseous spiral lamina【解剖】

spiral curriculum

outer spiral bundies

spiral heat exchanger

indexable endmill with spiral teeth

gear-cutting tool for spiral toothing