BS EN 60335-2-2. Household and similar electrical appliances. Safety. Part 2-2. Particular requirements for vacuum cleaners and water-suction cleaning appliances— 33 стр.
Geotechnical investigation and testing. Geothermal testing. Determination of thermal conductivity of soil and rock using a borehole heat exchanger— 38 стр.
Geotechnical investigation and testing - Identification and classification of soil - Part 2: Principles for a classification (ISO 14688-2:2004+Amd 1:2013) (consolidated version)