The infrared emission phototube is setted on the adjustable bracket front-end of the cover, so we can adjust the infrared emission phototube to aim at the infrared receiving phototube expediently.是什么意思_The infrared emission phototube is setted on the adjustable bracket front-end of the cover, so we can adjust the infrared emission phototube to aim at the infrared receiving phototube expediently.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句