允許用戶一次傳遞一個嘅機制 From Wikipedia, the free encyclopedia
閘機(turnstile)係一種簡單嘅機械,喺車站同遊樂園入口等嘅地方成日見到嘅機械,通常到大人嘅腰咁高,用途係要確保啲人要俾錢先至可以通過;一部基本嘅閘機會有:
閘門最早嘅用途同牧場上嘅樓梯式圍籬(stile)相同,只可以等人類穿越,防止羊群或者其他牲畜通過。第一個用現代方式運用閘門嘅人係克雷倫斯‧桑德斯(Clarence Saunders),佢將閘門放喺自己開設嘅超市入口位。
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