manual telephone exchange
常見(jiàn)例句
- A standard element of technology that can be traced to 1878 and the invention of the manual telephone exchange, the jack is apparently going the way of the floppy disk and the folding map.
這一標(biāo)準(zhǔn)技術(shù)元素可追溯至1878年，來(lái)自人工電話(huà)交換系統(tǒng)。 它似乎正在步入軟盤(pán)和折疊地圖的后塵。 返回 manual telephone exchange