echarts水球图实例（可把图例替换为A,B,C,D）

//水球形状A,B,C,D的路径 var shape_arr = ['path://M789,594h-32.2L744,560.7h-58.7L673.2,594h-31.4l57.2-146.7h31.3L789,594z M734.5,536l-20.2-54.5L694.4,536H734.5z', 'path://M879.8,447.3h58.7c11.6,0,20.

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