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A stopcock is a form of ball valve used to control the flow of a liquid or gas. Compared to the progressive control of a gate valve a stop cock's is coarse, confining their use principally to on-off applications. ==Use== 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Stopcock」の詳細全文を読む スポンサード リンク
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