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開關(guān)功能限定符. 可指定集中或擴展.Switching function qualifier. Concentrating or expanding can be specified.文件名或擴展名太長.The filename or extension is too long.網(wǎng)絡. 可指定對高次頻率加重或去加重 、 壓縮器或擴展器.Networks. Emphasis or de - emphasis of higher frequ...