svg表盘实例

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<text  x="120" y="205" style="font-family:Times;font-size:20"> 0 </text>
<text  x="160" y="145" style="font-family:Times;font-size:20"> 20 </text>
<text  x="215" y="145" style="font-family:Times;font-size:20"> 40</text>
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<g id="wendu">
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