Methods of test for petroleum and its products. Petroleum products. Transparent and opaque liquids. Determination of kinematic viscosity and calculation of dynamic viscosity— 18 стр.
Railway applications. Mounted parts of the traction transformer and cooling system. Gas and liquid actuated (Buchholz) relay for liquid immersed transformers and reactors with conservator for rail vehicles— 20 стр.
Railway applications. Mounted parts of the traction transformer and cooling system. Pump for insulating liquid for traction transformers and reactors— 34 стр.