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 Emergence of the Two Super Powers and the Roots of the Cold War. If you recall your World War II history, the United States and the Soviet Union were allies during the war. Together, these nations and others brought about the downfall of Hitler's Third Reich.When the war ended in 1945, these two countries emerged as world super powers. They were it: the two most powerful states in the world.When the war ended, the two super powers had very different ideas of how Europe should be restructured.Herein lies the roots of the Cold War.hen the war ended in 1945, these two countries emerged as world super powers. They were it: the two most powerful states in the world. When the war ended, the two super powers had very different ideas of how Europe should be restructured. Herein lies the roots of the Cold War.