#3455 多个series组成的雷达图，Tooltip显示无系列名称
#3455 多个series组成的雷达图，Tooltip显示无系列名称

hexj/echarts,apache/incubator-echarts,hexj/echarts,100star/echarts,ecomfe/echarts,apache/incubator-echarts,starlkj/echarts,100star/echarts,chenfwind/echarts,starlkj/echarts,ecomfe/echarts,chenfwind/echarts,hexj/echarts,starlkj/echarts