Gas-fired central heating boilers, type B boilers, of nominal heat input exceeding 70 kW, but not exceeding 300 kW. The general technical requirements and test methods
Secondary cells and batteries containing alkaline or other non-acid electrolytes. Safety requirements for portable sealed secondary cells, and for batteries made from them, for use in portable applications. Part 1. Nickel systems
The railway transport objects testing methods of prolongation operating cycle. Part 1. Power transformers and auto transformers for railway power substations, transform substations and power supply linear devices
