215. What is the range of the ratio of the pole length to pole pitch? a) 0.60-0.70 b) 0.64-0.72 c) 0.65-0.75 d) 0.70-0.80
215. What is the range of the ratio of the pole length to pole pitch? a) 0.60-0.70 b) 0.64-0.72 c) 0.65-0.75 d) 0.70-0.80
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