Do you use a graphic artist and pen, a capillary tube or a thin brush in between work, it is desirable to attach them so that they do not stain and do not dry out. In these cases, rescue of a conventional Laundry clothespin: the tool can be suspended in a glass of water or bottle of ink or paint.
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Today the state of technical creativity of pupils, I think we all know — it is deplorable. And even a talented teacher to inspire children is becoming increasingly difficult. One of the...
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The voltage is from 1 to 12 In intervals of a single oxen allows to obtain a transformer, the circuit of which is shown in the figure. If desired, the switching is easy to implement...
