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قديم 01-23-2018, 09:41 PM
ahlam1399 ahlam1399 غير متواجد حالياً
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افتراضي Davos co-chair: Why your backyard might save the planet

In 1764, British weaver James Hargreaves invented the spinning jenny, a mechanized yarn-spinning machine that enabled one person in a textile factory to do the work of eight. Industrial innovation of this kind transformed what had been a rural workforce, and among the new industrial workforce were young children often subjected to terrible working conditions.

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