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retractable step /ɹɪtɹˈaktəbəl ˈstɛp/ n

中文：伸缩踏步

中文 · 伸缩踏步Español · escalón retráctilFrançais · marchepied escamotable
Meaning：Folding apparatus attached to the door sill, for stepping up into or down from the caravan.
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Travel trailer

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