6.5 1.00R = 3.3 ( N / m ) 2.0 0.75R 6.5 0.50R = = 6.5 ( N / m ) 1.0 0.25R # 5-2 Ø try t ( 0 = tan - ' ( 60V | renD ) ) 30 60 90 120 150 180 V = 4 m / s n ...
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