Сегодня стали извест

Сегодня стали известны номинанты на премию «Оскар»

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New design for Engli

New design for English page!

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The first non-leakin

The first non-leaking ballpoint pen was invented in 1935 by the Hungarian brothers Lazlo and Georg Biro. Lazlo was a chemist and Georg was a newspaper editor.

A ballpoint marker had been invented much earlier in 1888 by John Loud, an American leather tanner, who used the device for marking leather. But Loud's marker leaked, making it impractical for everyday use. A new type of ink had to be developed; this is what the Biro brothers did. The brothers patented their invention and then opened the first ballpoint manufacturing plant in Argentina, South America.

What the invention?
Who invented it?
When was it invented?
Were there any prototypes?
Why was the invention necessary?
What happened to the invention later?

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informexciteimprov

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explain
collect
permit
enlarge
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move
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arrange
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Лента ваще в тему!

Лента ваще в тему!

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