PEEK are high-strength, radiation-resistant engineering plastics whose structures combine both ether and ketone groups. Both are thermally stable and highly resistant to chemicals. Principal uses are in machine parts, nuclear power-plant equipment, automobile parts, aerospace components, cable insulation, and pump parts.
To use the word "Dung" (Impartiality) to raise the Name is to shine the light on truth, to use the word "Luan" (Interpretation) to call the Name, is to understand the words. If the truth is not Named, it cannot enlighten, and so it is bound to "Dung" in order to be portrayed. Words, when unexplained, cannot be understood, so we must utilize "Luan" in order to to illustrate. When the truth has been portrayed, the words has been illustrated, then the practice and introspection can be left hanging. That is clear.
