Agitators for use in the above-mentioned reaction vessels or reactors; and impellers, blades or shafts designed for such agitators, where all surfaces of the agitator or component that come in direct contact with the chemical(s) being processed or contained are made from the following materials:
(د) الزجاج أو مبطنة بالزجاج (بما في ذلك الطلاء المزجج أو المينا)؛