[German Defense Minister says it will establish a tank maintenance hub in Poland] FYF, April 22-German Defense Minister Pistorius said at Ramstein Air Force Base on the 21st that Germany, Poland and Ukraine have signed an agreement to build a tank maintenance hub in Poland to repair and maintain the Leopard tanks previously delivered to the Ukrainian army. Pistorius said that the hub is expected to invest 150 to 200 million euros a year and could be put into use as soon as May this year. In addition, with regard to the current supply of fighter jets to Ukraine, he said that pilot training and fighter maintenance will take a long time to prepare. In response to the previous supply of artillery shells to Ukraine, Pistorius also said that limited production capacity, poor supply will continue.