Major types of positive-displacement pumps include: 1  Roots. 2  Lysholm twin-screw. 3  Sliding vane. 4  Scroll-type supercharger, also known as the G-Lader.
I believe that the first Reich refers to the establishment of the Holy Roman Empire in the 9th century was Charles the Great. The Second Reich was the unification of Germany under the Prussian Kaiser Wilhelm II in 1870. Of course, we all know what the Third Reich was. The First Reich was the Holy Roman Empire. There is little agreement as to when it was founded. Most German historians date the foundation from the coronation of Otto I in 962. That 'empire' had a continuous existence till 1806. The Second Reich was created by Bismarck in 1871 and lasted till 1918.
World War Two began in September 1939 when Britain and France declared war on Germany following Germany's invasion of Poland.he first was called the Rome-Berlin Axis Pact and allied Hitler's Germany with Mussolini's Italy. The second was called the Anti-Comitern Pact and allied Germany with Japan. Hitler's next step was to begin taking back the land that had been taken away from Germany. In March 1938, German troops marched into Austria.