单词	back taper
释义	back taper noun : a slight relief on a tap or drill causing it to have a larger diameter at the point than at the shank Word History First Known Use 1941, in the meaning defined above
随便看	dicycle Dicyclica dicyclies dicyclopentadiene Dicyemata dicyemid Dicyemida Dicynodon dicynodont Dicynodontia dicynodontiae dicynodontias dicynodonts did did a head count did a number on did away with did by did down antiseparatist antiseparatists antisepses antisepsis antiseptic antiseptically

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