溜索（英語：Zipline）是一種渡河工具，中國古代稱為撞[1]，它以一條鋼索或粗繩，連接山谷兩側，一頭高，一頭低，人可由高向低溜過河谷。可分為平溜和陡溜等。常見於山地，如中國的橫斷山脈。除渡人外，亦可渡貨物、牲畜等。
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