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.
A lava flow is a moving outpouring of lava, which is created during a non-explosive effusive eruption. When it has stopped moving, lava solidifies to form igneous rock. The term lava flow is commonly shortened to lava. Explosive eruptions produce a mixture of volcanic ash and other fragments called tephra, rather than lava flows. The word lava comes from Italian, and is probably derived from the Latin word labes which means a fall or slide.