Central drinking water supply - Guide lines regarding requirements for drinking water, planning, construction, operation and maintenance of plants - Technical rule of the DVGW— 10 стр.
Plastics - Determination of Charpy impact properties - Part 1: Non-instrumented impact test (ISO 179-1:2010); German version EN ISO 179-1:2010— 30 стр.
Plastics - Determination of tensile properties - Part 2: Test conditions for moulding and extrusion plastics (ISO 527-2:2012); German version EN ISO 527-2:2012— 18 стр.
German construction contract procedures (VOB) - Part C: General technical specifications in construction contracts (ATV) - Borehole sinking operations— 12 стр.
German construction contract procedures (VOB) - Part C: General technical specifications in construction contracts (ATV) - Borehole sinking operations— 16 стр.