cock

Japanese: cock
cock

…(4) Ball valve: A ball-shaped valve body with a hollowed-out flow passage is placed inside a valve box, and the ball is rotated 90 degrees around the diameter axis to open and close the flow passage (Figure d). Valves that use a conical plug instead of a ball are called cocks, and are widely used for gas valves and chemical experiments. Ball valves and cocks have the advantage of being highly airtight despite their simple structure, and can be opened and closed quickly by rotating 90 degrees. …

*Some of the terminology that mentions "cock" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…(4)ボール弁 流路をくり抜いたボール状の弁体を弁箱の中に入れ,そのボールを直径軸のまわりに90度旋回して流路の開閉を行うもの(図d)。ボールの代りに円錐状のプラグを使うものはコックcockと呼ばれ,ガス栓や化学実験用などに広く使われている。ボール弁,コックは構造が単純な割りに気密性が高く,また90度の回転で開閉が迅速に行える特徴がある。…

※「cock」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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