Investigations of the raw material in hard-coal-mining; determination of the particle-size-distribution <kleiner>60 µm by ultrasonic-microsieve-analysis— 8 стр.
Basic concepts in metrology; Terminology relating to the uncertainty of measurement and the assessment of measuring instruments and measuring equipment— 14 стр.
Investigations of the raw material in hard-coal-mining; determination of the particle-size-distribution <kleiner>60 µm by ultrasonic-microsieve-analysis— 8 стр.
Investigations of the raw material in hard-coal-mining - Microscopical examinations of hard coal, coke and briquettes - Part 5: Reflectance measurements on vitrinites— 21 стр.
Investigations of the raw material in hard-coal-mining microscopical examinations of hard coal, coke and briquettes; reflectance measurements on vitrinites— 11 стр.