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luni, 20 septembrie 2010

Dintele in care a dat in mai dentista cu scula s-a ciobit

Voia sa puna puntea mai repede ca sa plateasca vacanta in Canare. Dar abia acum s-a ciobit dintele, dupa vacanta ei.
Nu dau numele decat inceputul la prenume: Viol.
Sa merg la aceeasi sa puna puntea?

Solutia:
Asigurare dentara ca in China: platesc lunar dar opresc plata cand am probleme!


A invatat de la stramosii sai primitivi:
tools that require a sharp edge are made using cryptocrystalline materials that fracture in an easily-controlled conchoidal manner. Cryptocrystalline tool stones include flint and chert, which are fine-grained sedimentary materials; rhyolite, basalt, and felsite, which are volcanic rocks; and obsidian, a form of natural glass created by igneous processes. These materials fracture in a predictable fashion, and are easily resharpened. For more information on this subject, see lithic reduction.
Coarse-grained materials, such as granite and sandstone, may also be used as tool stones, but for a very different purpose: they are ideal for ground stone artifacts. Whereas cryptocrystalline materials are most useful for killing and processing animals, large-grained materials are usually used for processing plant matter. Their rough faces often make excellent surfaces for grinding plant seeds. With much effort, some large-grained stones may be ground down into awls, adzes, and axes.[6]

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