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».
Other types of muscular dystrophy. Some types of muscular dystrophy are defined by a specific feature or by where in the body symptoms first begin. Examples include: 1  Myotonic. 2  Also known as Steinert's disease, this form is characterized by an inability to relax muscles at will following contractions. 3  Myotonic muscular dystrophy is the most common form of adult-onset muscular dystrophy. 4  Facial and neck muscles are usually the first to be affected.