Вопрос № 223852 - Английский язык

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Tractors occupy an important place on the farm as a source of power. On many farms they, together with trucks or trailers, have entirely displaced horses for farm work. An advantage of tractors power over the horse is that tractor can be used continuously for heavy work. In addition to pulling implements like ploughs and cultivators, a tractor may be used with implements for bush-cleaning, ditch-filling and land-leveling. Small tractors from 1 to 10 horse-power, fitted with single-or twin cylinder petrol engines, may be used for garden and orchard work.

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The single-process machine or a tool with built-in auto-control can perform any process whenever it is fed with raw materials by the operator. It has its own source of power. An example is the automatic lathe in the use early in the 20th century.

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The single-process machine or a tool with built-in auto-control can perform any process whenever it is fed with raw materials by the operator. It has its own source of power. An example is the automatic lathe in the use early in the 20th century.

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Level 5 is the robot. This is the system which is powered and programmed to produce a succession of identical products or carry out a series of similar operations. The human can instruct the robot to vary its actions in accordance with variations which it observes in the surrounding situation.

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Since the Stone Age, man has found many more materials that he can work with to his advantage. His ingenuity has led him to discover the potential of many natural products. However, the materials that helped him most to develop were the metals.

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However, the materials that helped him most to develop were the metals. Their characteristics of the strength coupled with the ease with which they can be shaped made metals of vital importance in the technology of the past. The exploitation of other properties, such as electrical and thermal conductivity, made it possible to develop high technologies appropriate to the fields of space travel, communications and nuclear engineering.