The constant paper tension is one of the key technology in the cigarette maker design, for it can avoid paper break when the machine changing velocity.

等张力供纸是卷烟机设计的重要技术之一，它可有效减少机器在启动、变速、停机等操作过程中的断纸现象。

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But as long as such high returns are available on short-term government paper, even a tax break may not make longer-term, riskier investments look sufficiently appetising.

ECONOMIST: Brazil's new president

Foldable paper video demonstration after the break.

ENGADGET: MIT researchers revolutionize solar cell printing, fold the power of the sun into your everyday home (video)

After discussing the break-up Mr Fuller, a paper mill worker, went missing with the three children.

BBC: Sam, Rebecca and Charlotte Fuller