German standard methods for the examination of water, waste water and sludge - General information (group A) - Part 51: Calibration of analytical methods - Linear calibration (A 51)— 51 стр.
German standard methods for the examination of water, waste water and sludge - General information (group A) - Part 51: Calibration of analytical methods - Linear calibration (A 51)— 50 стр.
BS EN 17151. Plastics piping systems for non-pressure underground conveyance and storage of non-potable water. Test method for determination of long term compression strength of boxes— 17 стр.
