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	cowrote cowry cows cowshard cowsharn cowshed cowsheds cowskin cowskins cowslip cowslips cowson cowsucker cowtail cowthwort cowtongue cowwheat cowy cox Cox and Box cox-2 blocker COX-2 inhibitor coxa coxae coxal

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