Moment of torque 3. Modern enterprise period This is one of several economic forecasters who will suffer a downturn if voters leave the eu. The basic economic unit of society in the primitive society of the clan, tribe, slave owners in the slave society, feudal society's family and the manual workshop, after the evolution of the form of this modern form in a capitalist society was born enterprise. According to the length, there are mini passenger cars (no more than 3.5 meters), small passenger cars (3.5-7 meters), medium-sized buses (7-10 meters) and large passenger cars (more than 10 meters). In just three days, the 30-year bond jumped 16 basis points, the biggest gain since December 2008.