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.
Quality requirements for welding - Fusion welding of metallic materials - Part 1: Guidelines for selection and use; German version EN 729-1:1994— 8 стр.
Quality requirements for welding - Fusion welding of metallic materials - Part 2: Comprehensive quality requirements; German version EN 729-2:1994— 9 стр.
Stainless steels - Part 3: Technical delivery conditions for semi-finished products, bars, rods and sections for general purposes; German version EN 10088-3:1995— 34 стр.
German construction contract procedures (VOB) - Part C: General technical specifications in construction contracts (ATV) - Borehole sinking operations— 14 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— 12 стр.
German construction contract procedures (VOB) - Part C: General technical specifications in construction contracts (ATV) - Borehole sinking operations— 16 стр.