Planned ventilation of the mine openings.

Ventilation is the planned supply of the mine with fresh air.

Site of the pit ventilation system which supplies the mine with fresh air by creating an artificial air flow.

In nuclear energy a term for a melted, vitrified block of high-level radioactive waste including its metal housing made from corrosion-resistant steel which is welded gas-tight.

Measure of the labour required for bringing a charge in an electric field from one point to another, divided by the charge. The unit is Volt (V).