Determination of certain substances in electrotechnical products. Part 4. Mercury in polymers, metals and electronics by CV-AAS, CV-AFS, ICP-OES and ICP-MS
Signal conversion equipments for simultaneous duplex data transmission on the switched channels general telephone network with the speed 2400 bit/s. Types and basic parameters
Microbiology of food and animal feeding stuffs. Method for the enumeration of yeasts and moulds. Part 1. Colony count technique in products with water activity greater than 0,95