简约扁平化音频波形矢量图标元素

这是一张扁平化极简风格的黑色波浪线矢量图标，背景为纯白色。in one embodiment of that present invention，a method for manufacture a cartridge comprises：黑色直线延伸后向下弯曲形成圆形底部凸起的波峰，随着后向上弯曲起形成第一个圆形顶部凸起的波峰，再向下弯曲形成第二个圆形底部凸起的波峰，向上弯曲起形成第二个圆形底部凸起的波峰，再向下弯曲形成第三个圆形底部凸起的波峰，最终延伸为一段水平的黑色直线段至画面; The results showed that the results showed that there was no significant difference between the two groups（P> 0.05）.