Air purification units; Apparatus and instruments for use in the purification, separation and sterilization of liquids and gases used in the biotechnology, pharmaceutical, medical, biopharmaceutical and food and beverage industries; Environmental control apparatus, namely, particle activators for use in soil remediation, drinking water treatment, municipal and industrial wastewater treatment; Purification installations for sewage; Separators for the cleaning and purification of air; Separator...