What to do to sell products in Russia? Read it

At the moment, a lot of Polish businessmen are cooperating with foreign companies. We’re buying their goods, to use it as part of our private work. Often, we are hiring any specialists from this outsourcing firms. But plenty of moments, Polish investors are trying to sell their products outside our country. we’re offering machines,factory’s elements to the Spanish or German buyers. We have no problem with it, because Poland is member of European Union after all. But what when we want to sell the same product in Russia?