The patent runs out in three years' time.
这项专利期限为三
。
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Though devices for keeping food cold have been around for decades, Marshall's refrigeration machine got it's patent in 1899. 119 years later, refrigerators have touch screens and cameras connected to your phone that let you see what's inside.
虽然低温保存食物
装置已经存在了几十年了,但是Marshall's
制冷机在1899年获
了专
。 119年后,冰箱有了触摸屏和摄像头,它可以连接到你
手机上,让你看到里面都有什么。
多