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Si, si, or SI may refer to (all SI unless otherwise stated): == Measurement, mathematics and science == * International System of Units (''Système international d'unités''), the modern international standard version of the metric system * Signal integrity, electronic circuit tools and techniques that ensure electrical signals are of sufficient quality for proper operation * Si, the chemical symbol for silicon * Si(x), the sine integral in mathematics * Survey of India, an Indian government agency responsible for managing geographical information about India * Simple Interest (Mathematics) 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「Si」の詳細全文を読む スポンサード リンク
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