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Surgery [a] is a medical specialty that uses manual and instrumental techniques to diagnose or treat pathological conditions (e.g., trauma, disease, injury, malignancy), to alter bodily functions (e.g., malabsorption created by bariatric surgery such as gastric bypass), to reconstruct or alter aesthetics and appearance (cosmetic surgery), or to remove unwanted tissues (body fat, glands, scars ...
British Rail Class 55 Deltic diesel locomotive with their characteristic dense exhaust when starting a train.. Diesel exhaust is the exhaust gas produced by a diesel engine, plus any contained particulates.
Artist's conception of the outdoor interior space within The Line. The Line is eventually planned to be 170 kilometres (110 miles) long. [4] [14] [15] It could stretch from the Red Sea approximately to the city of Tabuk and could have nine million residents, resulting in an average population density of 260,000 per square kilometre (670,000/sq mi). [6]