The students are observing the behavior of tin underheat.
学生们正在观察锡受热发生的变化。
2
The first base can be cooled, and then re-loaded while the other load is underheat.
这样，第一个料台首先冷却，然后重新装料，而另一个料台还在加热。
3
Like compression molding, this method is used to form thermoset materials and involves permanently curing the plastic in a mold underheat and pressure.