The answer is functional formal
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- Pantograph is the instrument used fir enlargement and reduction of maps with accuracy.
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The basic structure of a volcano consists of a magma chamber, central vent and crater. Other elements are: pipe, side vent and lava flow. Magma chamber is the pocket beneath a volcano where magma collects. Central vent is the central opening through which molten rock and gas leave a volcano. The crater is a bowl-shaped area that forms around a volcano's central opening.
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Abstract
Nitrous oxide has been used therapeutically as an anesthetic and an analgesic for more than 100 years. The anesthetic effect is thought to be mediated primarily by the reversible inhibition of the N-methyl-d-aspartate type of glutamate receptors resulting in inhibition of excitatory glutamatergic neurotransmission. Nitrous oxide exerts it analgesic effects via activation of opioidergic neurons. Most significant human exposure to nitrous oxide occurs in medical settings either by therapeutic administration or as unintended exposure:
The middle landform due to the force