[Class : 11] Apparatus And Installations For Purification And Filtration Of Gases, Flushing Installations And Removal Of Hydrogen Sulphide

[Class : 42] Scientific And Technological Services And Research And Design Relating Thereto, Industrial Research And Industrial Design Services; Services Of Engineers And Scientists Who Undertake Evaluations, Estimates, Research And Reports In The Scientific And Technological Fields, Including Technological Consultancy, Conducting Technical Project Studies, Engineering, Mate...