Please list the product descriptions of the transactions taken place in the gas stations in the Czech Republic.
Gas station in the Czech Republic implies that Country = CZE
SELECT T3.Description FROM transactions_1k AS T1 INNER JOIN gasstations AS T2 ON T1.GasStationID = T2.GasStationID INNER JOIN products AS T3 ON T1.ProductID = T3.ProductID WHERE T2.Country = 'CZE'