The blade flapping lead - lag angles rotor are vital parameters of a helicopter.

旋翼挥舞角、摆振角是直升机的关键参数.

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The static measurement includes weight, center of gravity, static lead lag, bending stiffness and torsion stiffness.

静态测量包括重量, 重心, 静前沿滞后, 弯曲钢度,和扭区钢度.

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