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Measuring means for hydrogeological field research. Types. Main parameters. General requirements
Document status: Active
Niobium pentoxide. Atomic-emission method for determination of titanium , silicon, iron, nickel, aluminium, magnesium, manganese, cobalt, chromium, lead and zirconium
Document status: Active
Hard coals. Determination of Hardgrove grindability index
Document status: Active
Heading machines having cutter heads mounted on booms. Basic parameters and dimensions. General technical requirements
Document status: Withdrawn