Preheating shall be carried out for carbon and low alloy steel welding where required. Preheating temperature shall be kept uniform from the start to the end of welding.

在进行碳钢及低合金钢的焊接时应进行预热。预热温度在焊接开始到结束期间应保持均衡。

youdao

The world was only 1.5 C to 2 C (2.7 F to 3.6 F) warmer then, a temperature rise at the low end of the range predicted for the end of this century.

到本世纪末，全球的平均最低气温差不多会上升1.5度到2度。

youdao

Since exit temperature increases from front to rear for a given extrusion speed and set of temperature conditions, the low front-end properties are a result of low extrusion exit temperatures.

因为对于给定的挤压速度和温度条件组出口温度从前部向后部增加，因此低的前端性能是低挤压出口温度的结果。

youdao

Let's say we start from some V1 and p1 here, so high pressure, small volume and we end up with a high volume low pressure, under constant temperature condition.

例如我们要从压强比较高，体积比较小V1，p1出发,到达低压强，大体积的末态，过程中温度不变。

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