直热式主辊筒，有效加热面积超过了75%，提高了能源的利用率。

The main roller is of direct-heating mode, which makes the effective heating area exceed 75% and increases the energy utilization.

youdao

加热面积大、升温快、保温效果好、节能；功率调节式、温度调节式。

It features in large heating area, rapid heating up, good thermal protection effect and energy-saving effect.

youdao

探明了熔化变形面积与接触加热能量及材料性质参数有关且其变形大小与静熔焊概率大小一致。

The melting deformation area is dependent on the energy heating the contact surface, the meterial parameters and the deformation is identical with the welding probability.

youdao

That's the work that the system is doing to the environment. I'm doing work to the environment. The work is negative, which means that work is being done to the environment.

功的大小,就是矩形的面积,这样我们就实现了一台热机，冷却，加热，加热,冷却，系统回到了初态。

麻省理工公开课 - 热力学与动力学课程节选