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.
Third Reich: An Overview. Germans cheer Adolf Hitler as he leaves the Hotel Kaiserhof just after being sworn in as chancellor. Berlin, Germany, January 30, 1933. The Nazi rise to power brought an end to the Weimar Republic, a parliamentary democracy established in Germany after World War I. Following the appointment of Adolf Hitler as chancellor on January 30, 1933, the Nazi state (also referred to as the Third Reich) quickly became a regime in which Germans enjoyed no guaranteed basic rights.