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».
Muscular Dystrophy Symptoms | Causes of Muscular Dystrophy | Muscular Dystrophy Treatment | Muscular Dystrophy Cure | Muscular Dystrophy Research. Title Toe Walking. Muscular Dystrophy refers to a large number of inherited muscle diseases which cause muscle weakness. The term dystrophy refers to the fact that these diseases can begin at birth or later in life but cause progressive weakness. This weakness can involve the face, arms or legs.