Each mount can rotate 360 degrees and has a 90 degree arc of fire.
每个安装可以旋转360度，并有一个90度的弧形火灾。
Also the curves can express the circle arc and ellipse arc and can construct rotate surfaces.
同时它还能精确表示圆弧、椭圆弧等二次曲线，推广到空间即可以表示旋转曲面。
Also the curves can express the circle arc and ellipse arc and can construct rotate surfaces.
同时它还能精确表示圆弧、椭圆弧等二次曲线，推广到空间即可以表示旋转曲面。
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