桨频（tempo）是赛艇运动技术术语，指单位时间内的划桨次数。
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采用现场摄影法，比较世界杯赛中男女皮艇运动员的桨频和划桨节奏。
It applied the method of on-the-spot photograph to comparing the stroke frequency and rhythm of the male and female kayakers who took part in the "World Cup".
目标的螺旋桨不同则轴频不相同。
螺旋桨轴频是被动声纳极其重要的目标识别特征之一。
The propeller shaft frequency is one of the important target recognition features for passive sonar.
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