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Drill pipes are designed for equipment of wells

Types of gas masks and the story of their creation

Preparing for repair: what do cement

Laminated veneer: the scope of the

How does a gas turbine?

Industry Germany.

Machine gun "Maxim", the American, English and Russian

Machine gun "Utes": design and scope

Who discovered the phenomenon of vulcanized rubber, and what is it?

What may be needed nuclear aircraft carriers Russia?

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