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	ostariophysan Ostariophyseae Ostariophysi ostariophysial ostariophysies ostariophysina ostariophysine ostariophysis ostariophysous oste- osteal osteichthian osteichthians osteichthyan osteichthyans Osteichthyes osteichthyeses osteichthyesses ostein osteites osteitides osteitis Ostend ostende ostensibility

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