Условие:
1. Above certain critical temperature, changes begin to take place in the molecular structure of a metal.
2. To prepare metals for practical use requires much knowledge and experience.
3. The aim of any research is to enlarge the possibilities which are offered by modern science.
4. In order to prevent corrosion, metals to be used in industry must be covered with special paint.
5. It is difficult to define what an amorphous material is. It may be composed of crystals which are too small to be detected.

