THIẾT BỊ CỨU HỘ THỦY LỰC

In the pre-war period the Department of Artillery of Poland’s Ministry of National Defence ordered the construction of a device that could be helpful in locating duds on artillery training grounds.In the pre-war period the Department of Artillery of Poland’s Ministry of National Defence ordered the construction of a device that could be helpful in locating duds on artillery training grounds.In the pre-war period the Department of Artillery of Poland’s Ministry of National Defence ordered the construction of a device that could be helpful in locating duds on artillery training grounds.