Allen key
noun [ C ] trademark uk/ˈæl.ən ˌkiː/ us/ˈæl.ən ˌkiː/ (also Allen wrench)
艾伦内六角扳手(一种L形金属工具,用来拧六角螺丝)
a brand name for an L-shaped metal tool with six sides that is used to turn a screw that has a six-sided hole in the top
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