EDDY Apprentice. Whats the difference between CNC and NC machine and do u people know any institute which teaches CNC programming. #1 Jul 24, 2009. Aashish Joshi Maniac. Engineering Discipline: Mechanical. In a Numerical Control machine, the program is fed to the machine through magnetic tapes or other such media.
A volcano is a vent or chimney which transfers molten rock known as magma from depth to the Earth's surface. Magma erupting from a volcano is called lava and is the material which builds up the cone surrounding the vent. A volcano is active if it is erupting lava, releasing gas or generates seismic activity.
Lava. Magma which has reached the surface through a volcanic eruption. The term is most commonly applied to streams of liquid rock that flow from a crater or fissure. It also refers to cooled and solidified rock.ruption. The process by which solid, liquid, and gaseous materials are ejected into the earth's atmosphere and onto the earth's surface by volcanic activity. Eruptions range from the quiet overflow of liquid rock to the tremendously violent expulsion of pyroclastics.