Overhead AC transmission lines share one characteristic; they carry 3-phase current. The voltages vary according to the particular grid system they belong to. Transmission voltages vary from 69 kv up to 765 kv. The following are examples of different overhead transmission line structures in use today. The DC voltage transmission tower has lines in pairs rather than in threes (for 3-phase current) as in AC voltage lines.
The list of signs and symptoms mentioned in various sources for Muscular Dystrophy includes the 10 symptoms listed below: 1  Gait problems. 2  Waddling gait. 3  Falls. 4  Difficulty standing up. 5  Difficulting climbing stairs. 6  Difficulty descending stairs. 7  Lordosis. 8  Firm-looking muscles. 9  Enlarged muscles. 10  Enlarged calf muscles. 11  more information...Â».
Myotonic dystrophy. As with other types of muscular dystrophy, myotonic dystrophy involves progressive muscle weakness and muscle wasting. However, it's often the smaller muscles that are affected first, such as those in the face, jaw and neck.Myotonic dystrophy can appear at any time between birth and old age.ll types cause muscle weakness, but the areas affected and the severity of the symptoms are different. Typical symptoms of some of the most common types of MD are explained below. Muscular Dystrophy UK also provides a dropdown list of specific muscle-weakening conditions.