Decontamination of medical and chemical waste; rental of industrial vacuums for treating hazardous materials in the nature of asbestos; manufacturing services for others in the field of mixers for liquid and solid material for use in the paper and pulp industry; manufacturing services for others in the field of machines for bleaching and addition of chemicals for use in the paper and pulp industry; manufacturing services for others in the field of heating units consisting of heaters and steamers