When calculating, only function of the longitudinal generating curve of the revoluted curved surface and the value of the projecting angle are needed to be substituted into these formulas.

这些公式的运用很简便，只常将回转曲面的纵母线函数及投射角的值代入即可。

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The projecting beam angle can be manually adjusted using a screwdriver, and the adjustable power setting reduces hot spots and washouts.

投影光束角度可使用螺丝刀手动调节，可调节电压的设置能降低热点和冲刷的伤害。

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