The transmission line enclosure extends the low frequency by a long wave guide; however the over-length of the wave guide may lower the speed of the low frequency.是什么意思_The transmission line enclosure extends the low frequency by a long wave guide; however the over-length of the wave guide may lower the speed of the low frequency.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句