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».
Symptoms vary with the different types of muscular dystrophy. All of the muscles may be affected. Or, only specific groups of muscles may be affected, such as those around the pelvis, shoulder, or face. Muscular dystrophy can affect adults, but the more severe forms tend to occur in early childhood. Symptoms include: 1  Intellectual disability (only present in some types of the condition). 2  Muscle weakness that slowly gets worse. 3  Delayed development of muscle motor skills. 4  Difficulty using one or more muscle groups. 5  Drooling. 6  Eyelid drooping (ptosis). 7  Frequent falls. 8  Loss of strength in a muscle or group of muscles as an adult.