A fluid or oil is supplied to market in plastic canisters of different capacities. A worn or leaky thrown into the garbage. However, one can do some useful things — for example, podtsvetochniki or scoop, similar to what is shown in the figure.
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In addition to the hourglass, there are more structurally similar water. Their simplified version can be made and most. Enough to take two graduated bottles for baby food and to connect...
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The rebirth of experienced design Bureau, which was headed by the famous Soviet aircraft designer Pavel Osipovich Sukhoy, occurred in 1953. The new experimental design Bureau had to...
