A flange is arranged under the reaction tube and provided with a positioning convex block.

在反应管下面设有法兰盘，该法兰盘上设有一个定位凸块。

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The automatic automatic welding dual - phase stainless steel reaction tube and tube sheet on methanol converter is introduced.

介绍甲醇合成塔双相不锈钢反应管与管板的自动焊接工艺。

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With a temperature of 3,000 kelvins, this ring of heat speeds along the tube 10,000 times faster than the normal spread of this chemical reaction.

当温度达到3000开尔文（Kelvin，热力热温度，等于摄氏温度加273），这个热量环（ring of heat）沿着纳米管移动的速度将比这类化学反应（chemicalreaction）的正常传递速度快10000倍。

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Here's a way that you can do it in a test tube without using any cells by this process called Polymerase Chain Reaction.

但有一个方法可以让你在试管中完成,不用细胞,这个方法叫聚合酶链式反应

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Once an isotope causes the crystal to flash, a photosensitive cathode releases electrons into a vacuum tube where a chain reaction produces a cascade, as in the Geiger counter.

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