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	-rrhaphy -rrhea -rrhexes -rrhexis -rrhine -rrhiza -rrhizae -rrhizas -rrhoea -ry -saurus -schises -schisis -schisises -scopy -semic -sepalous -ses -sie -sies -somatous -somi -somia -somic -somus

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