但是正向挤压机也存在一个热力学的问题。

But the direct extrusion press has a thermodynamic problem.

youdao

正向挤压机是普遍采用的设计，因为它易于生产加工、控制使用和维护保养。

The direct extrusion press design is the most popular design because it is simple to produce, operate and maintain.

youdao

增加了挤压的生产时间这一变化是好的，但也增加了正向挤压的热力学问题。

This change is good for increasing the productive time of the press but it increases the natural thermodynamic problem with the direct extrusion press.

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