Посмотрите на схему 15 в Приложении Е и дайте описание пластичного сдвигаПереведите текст. 3 “Welding” Сварка Welding 1. Welding is a process of joining together metallic parts by heating the place of contact to the fusion state. 2. Welding processes are classified according to the source of energy employed for heating, the metals and the state of the metal at the place of welding. 3. There are different types of welding such as hammer welding, thermit welding, electric arc welding, gas welding, etc. 4. Hammer welding is a process in which two heated metal parts are joined and fused together by force from a power hammer. 5. Resistance welding process forms a whole group consisting of many types of welding such as spot welding, butt welding and others. 6. In arc welding the work piece are not melted by a flame. They are melted by an electric arc. In order to create the arc, a powerful electric current must be provided. The current must be at least 60 A, otherwise the arc will not create enough heat. 7. In gas welding, it is necessary to use a mixture of two gases. To create a hot flame, a combustible gas must be mixed with oxygen. Gas welding is normally used to join steel to steel. Прочитайте текст и выполните следующие за ним упражнения. Переведите на русский язык встречающиеся в тексте интернациональные слова и определите части речи. Process, metal, metallic, contact, classify, energy, type, gas, chemical, reaction, section, form, electric, normally. Расставьте следующие слова по алфавиту. Переведите их. Process, together, heating, contact, fusion, state, according, sours, energy, different, such, hammer, electric, gas, parts, rails, resistance, sport, mixture. Классифицируйте следующие слова по способу образования. Welding, metallic, heating, electric, chemical reaction, resistance, workpiece, powerful, otherwise, mixture, combustible, normally. Расшифруйте следующие сокращения, пользуясь словарем. AP, IT, beg. bal., Cr., Dept.; 4 CL. Выпишите из текста все термины и классифицируйте их. 7. К какому типу относятся следующие словосочетания? Переведите и классифицируйте их. А process of joining; metallic parts the state of metals, process consisting of a chemical reaction; a combustible gas resistance welding process. Объясните употребление артикля. Какое значение он имеет в каждом случае. А process of joining, the place of contact, to the source of energy, at the place of welding, from a power hammer, with oxygen. Переведите следующие пассивные сказуемые. Are classified, are joined and fused, is used, are not melted, are melted, must be provided, must be mixed, is normally used.
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