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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Squash ball machine ： ウィキペディア英語版 Squash ball machine A squash ball machine is a mechanical device that automatically throws out squash balls at different speeds and angles. Its main purpose is to help players to develop their ball hitting technique. ==Overview== The features of squash ball machines are modeled after the rules of squash and the constituency of squash balls. Squash is a ballgame that is played by hitting a ball with a racket against a wall, similar to a backboard, so that the ball bounces off the wall. The opponent player has to hit the ball back against the wall without letting the ball bounce more than once.〔(Rules of Squash ) U.S. Squash. Retrieved 2013-02-13.〕 The game can be played either by two people (the "singles" version), or by four people (the doubles version), in either a smaller court (singles and softball doubles) or a larger one (hardball doubles).〔Ralph Hickok (Sports rules: Squash rackets ) Hickok Sports. Retrieved 2013-02-13〕 The balls used in squash are small rubber balls that can differ in terms of diameter, weight and softness. These features determine the speed and bouncing amplitude of the ball, with softer balls being generally slower than the harder balls. The temperature of the ball also affects the amount of bounce: the warmer the ball, the more it bounces.〔(Squash balls ) Squashplayer.co.uk. Retrieved 2013-02-13.〕 Because cold squash balls have little bounce, the squash balls are hit multiple times at the beginning of a game to warm them up. It also means that a game becomes gradually faster as it advances and that softer balls may be too slow to be used in colder climates.〔(Hardball squash rackets ) Encyclopaedia Britannica Online, Retrieved on 2013-02-13〕 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「Squash ball machine」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.