名词
中文翻译：平均螺旋角
同义词：
['mean angle', 'mean radius']
例句：
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1.The engineer calculated the mean spiral angle of the screw.
工程师计算了螺丝的平均螺旋角。
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2.The mean spiral angle of the satellite was measured to be 30 degrees.
卫星的平均螺旋角被测量为30度。
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3.The mean spiral angle of the blades is crucial for its efficiency.
叶片的平均螺旋角对其效率至关重要。