When you install the tent, her stretch marks are usually tied to trying to drive in the ground with wooden pegs or metal pins. However, gusts of wind, the pegs loosened and pulled out.
This does not happen, if the metal pin to turn into a kind of anchor by bending and sticking into the ground as shown in the figure.
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To measure the temperature of the liquid in the bottle with a narrow neck pretty hard. Replace the thermometer with a rubber or polihlorvinilovuju up, and the problem will be solved.