Background.Polandis one of the largest common carp producers in the European Union.By 2006, the annual production of carp and other cyprinid fish species had reached around 17 000 t.The economic efficiency of pond farms is not only significant for the performance of Poland’s traditional carp market, but it also supports the non-p
The region of Middle East has been for centuries space of interweaving DRY EYE RELIEF of interests of power holders, both within the countries of the region and major world powers.The favorable geographical position and significant reserves of natural resources, principally oil, make the Middle East, in terms of security, very sensitive.Clash of ci
The problem of the research Foodcover conceder Inefficiency of the floors of open or closed sports fields in weather conditions such as heat and rain.also, the floors of sports fields are affected by constant pressure on them, which exposes them to damage and shredding.Most of these floors are imported from abroad and there is no Egyptian technolog