In the case of a truss bridge, a post-tensioned slab bridge, or a box girder bridge the sections are often floated to the bridge and then lifted into place by cranes on barges or cranes sitting over piers.
The very good reason why the word communism is so commonly associated with these revolutionary, anti-liberal, anti-democratic Marxists is that political parties with communist in the name were pretty much invariably of that bent throughout the 20th century, whereas parties called socialist or social democrat or labor varied enormously in ideology.
Marxist Communism. By far the most famous form of communism is Marxist Communism. Based on the writings of Karl Marx, the concept of Marxist Communism became very influential in the 20th century because it inspired the communist revolutions of the Soviet Union, China, Vietnam, Korea, Nicaragua, and Cuba, among others.he world portrayed here is a communist society. In simple terms, communism is a society in which private property and social class do not exist and the government owns all things necessary to make and transport products.