MATERIAL OF CONSTRUCTION OF THE NATURE OF SELF-HARDENING ORGANIC RESIN COMPOSITION, USED AS A BONDING CEMENT FOR ACID-PROOF BRICK OR TILE, AND INGREDIENTS FOR PREPARING SUCH CEMENT, INCLUDING AN ACID-SETTABLE ORGANIC RESINOUS REACTION MIXTURE, AND A SEPARATE COMPOSITION THAT INCLUDES A SETTING AGENT FOR SAID RESINOUS REACTION MIXTURE

Providing on-line training courses, seminars, workshops in the field of beauty, anaesthetics, skin care