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scroll box

微软 case de défilement (A component of a scroll bar that indicates the relative position (and optionally the proportion) of the visible information relative to the entire amount of information. The user can drag the scroll box to view areas of information not currently visible)
计算 boite de défilement; curseur de défilement
 英语 词库
scroll box
缩写, 编程 scrollbox (ssn)