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.
The Third Reich would be the third german empire in history. The first was the Holy Roman Empire. The second was the Second Empire of 1871-1918. However, the term Third Reich was more popular in other countries. In Germany, it was merely called The Reich. The Nazis called their empire the Greater German Reich. Hitler led Nazi Germany until it was defeated in World War Two in 1945 and Battle of Berlin#Berlin fell, when he killed himself. The Nazi Party was destroyed in the same year as its lead