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The helium-neon and argon-ion lasers provided a continuous output of laser light, as opposed to the pulsed output of the metal vapours.•
The metal-oxide-semiconductors technology produces transistors of the unipolar type in contradistinction (or in contrast) to the earlier junction transistors, which are bipolar.•
Contrary to upsetting, extrusion reduces the diameter of ...•
Contrary to popular belief, not all mixtures of hydrogen and oxygen are dangerous.•
In contrast to most metals, the conductivity of semiconductors increases with temperature.