单词	Allen screw
释义	Allen screw noun Al·​len screw ˈa-lən-  hardware : a screw with a hexagonal socket in its head that is designed to be used with an Allen wrench Word History First Known Use 1917, in the meaning defined above
随便看	haps Hapsburg hapsburgs hapt- hapten haptenes haptenic haptens haptera haptere hapteron hapterons haptic haptical hapticcer hapticcest hapticer hapticest haptics hapto- haptoglobin haptoglobins Haptopoda haptor haptoral

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