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Powder Metallurgy Looks Towards the Future



Developments and advances in powder metallurgy, a technology created some 50 years ago, can save manufacturing industry great amounts of valuable materials. Powder metallurgy is a cheap alternative to many conventional manufacturing processes.

When components, simple or complex, require precision and high quality at a comparatively low cost – powder metallurgy can provide the solution of the problem. An important feature of powder metallurgy is that it can provide the industry with such material compositions which are not achievable by any other means.

Components produced by the powder metallurgy process can go straight into the manufacturing cycle or, if required, undergo further processing, including heat treatment. Powder metallurgy is finding new applications in various industries - in electronics, aviation, machine-building, etc.

The unique physical properties of powder metallurgy parts enable oil to be retained in minute porous cavities1 within the part. This self-lubricating characteristic 2 is long lasting and can eliminate other lubrication systems.

The Byelorussian research and production association for powder has developed a number of processes for powder metallurgy components production. The source material there is metal powder which is subjected to high pressure to acquire a required shape and is then put to thermo-electric furnaces. The resultant parts are more durable and require no additional machining.

Пояснения к тексту:

1. minute porous cavities – крошечные пористые пустоты

2. self-lubricating characteristic – свойство, обеспечивающее самосмазывание деталей

Вариант 4

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He wanted us to visit the art exhibition.

High export tariffs are considered to hurt the economy.

This machinery is supposed to be installed here next month.

The device to be tested will arrive here tomorrow.

2. Перепишите и письменно переведите на русский язык следующие предложения. Обратите внимание на перевод зависимого и независимого (самостоятельного) причастных оборотов (см. образец выполнения 2).

The teacher having asked many questions, the student had to spend much time to answer them.

The talks between two countries were conducted behind the closed doors, measures having been taken that no correspondent should receive any information.

Having finished the experiment they discussed the results.

3. Перепишите и письменно переведите на русский язык следующие сложные предложения. Обратите внимание на перевод условных предложений (см. образец выполнения 3).

It is necessary that the car should be repaired by tomorrow.

If you apply this method of calculation you will get good results.

If the air were only composed of nitrogen burning would be impossible.

4. Прочитайте и устно переведите с 1-го по 5-й абзацы текста. Перепишите и письменно переведите 1, 2, 3, 4-й абзацы текста.





Дата публикования: 2014-11-28; Прочитано: 665 | Нарушение авторского права страницы | Мы поможем в написании вашей работы!



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