It is, therefore, {TAIL ~ an object} of the present invention to provide an SGB for a video tape recorder , which has a simple structure, thereby requiring a small number of components so as to decrease the cost and simplify the assembly, and which achieves {HEAD ~ high reliability} and performance 
It is , therefore , { TAIL ~ an object } of the present invention to provide an SGB for a video tape recorder , which has a simple structure , thereby requiring a small number of components so as to decrease the cost and simplify the assembly , and which achieves { HEAD ~ high reliability } and performance
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