The pulse envelope we obtained is a hyperbolic secant function of time.
所得脉冲包络为时间的双曲正割函数。
Secant blade lift, swing all by the handle adjustment, simple and efficient.
割线锯片升降，摆动全部由手柄调节，简便高效。
The slope of secant drawn from the origin through the point is the average function.
从原点出发并连接该点所构成的割线的斜率即为曲线的平均函数。
The main blade and the blade Angle secant Angle precision instrument by the visual display.
主锯片及割线锯片倾角由精密角度仪直观显示。
The main blade and the blade Angle secant Angle precision instrument by the visual display.
主锯片及割线锯片倾角由精密角度仪直观显示。
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