火箭喷口3000度高温热气，为何自身不融化？1

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[@engineallway]

火箭發動機 與航空噴射發動機設計 製造上就有牽涉到金屬材料學，熱力學等...很多知識

[@user-uw5nf5wx1w]

氣焊機的噴頭是純銅做的，銅的熔點是1000度多一點點，但噴頭火焰很快就把熔點1500度的鐵給熔化了，但噴頭用了幾年後還是絲毫無損。

[@huixiangh5177]

气焊、气割的喷嘴不接触火焰，乙炔氧气喷出嘴口混合燃烧，温度最高部分是外焰，火焰是离开喷嘴的。

[@user-cu1yt5vh7u]

如果马斯克的视觉驾驶技术演变成视觉雷达呢？这家伙还有用吗？

[@user-nv8gr6ge3o]

棒影片，但應少露臉，多顯示圖表，那會理解更好。（我是學習中文的德國人）

[@user-nw8sp6bx7k]

是不是被台湾人忽悠了，学习简体字才是主流

[@sashaprivet1107]

切割机喷嘴没冷却系统，咋不会融化呢？

[@user-nu9vj4hg6p]

其燃燒火焰在高壓氣體的作用下離噴口有段距離，溫度便下降至噴嘴可承受範圍。

[@apolyedapolyed7524]

警察用火柴燂人龜頭，應該1000度都無。