First, code a needle using vector drawing.
首先，为使用矢量图的指针编写代码。
Cairo is a free software vector drawing library that can draw to multiple output formats.
cairo是一个免费的矢量绘图软件库，它可以绘制多种输出格式。
In the process of getting vector drawing, how to remove the noises is always difficulty.
工程图纸的矢量化过程中，噪声的正确消除一直是比较难解决的问题。
Create any shape graphics with full vector-based drawing tools.
创建任何形状的图形具有完全基于矢量的绘图工具。
Create any shape graphics with full vector-based drawing tools.
创建任何形状的图形具有完全基于矢量的绘图工具。
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