By numerical simulation of a six-tooth rectangle spline, the optimized half-angle of the concave die can be got.

结合六齿矩形花键轴实际成形情况进行模拟计算，获得了入模半锥角的较佳取值范围。

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This paper describes a new method and device for measuring helical line, pitch diameter, taper and half-angle of thread of petroleum thread gauges.

本文介绍一种测量石油螺纹量规的螺旋线、中径、锥度和牙形半角的新方法及装置。

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If I pick an angle of 60 degrees, these are some numbers like half and root 3 over 2.

要是我选择一个60度的角，这些数就会是二分之一和二分之根号三。

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Despite Suarez sealing the three points with a stunning second-half strike from a tight angle, the crucial breakthrough that infuriated Bruce so much was the spot-kick awarded 11 minutes before the interval.

BBC: 'Bizarre' penalty angers Sunderland boss Steve Bruce

Centre-back Antar Yahia settled the contest with a stunning first-half volley at an angle eight yards out from Karim Ziani's punt into the box.

BBC: Yahia sends Algeria to World Cup

Tom Shanklin - perhaps fortunate to still be on the field after a clumsy challenge in the air on Imanol Harinordoquy - got beyond the gain-line and from there fly-half Jones picked out Byrne's superb angle for the full-back to race 35 untouched metres to the line.

BBC: France 21-16 Wales