Lignitos duros, hullas y antracitas. Toma y preparación de muestras. Parte 1. Toma de muestras.
HARD COAL. SAMPLING AND SAMPLES PREPARATION. PART 1. SAMPLING.
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73.040 / Coals
CTN 22/SC 1/GT 1 - Carbones
ISO 1988:1975 (Identical)
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