cad线全选知道长度

要在CAD中选择所有线的长度，可以按照以下步骤进行操作：

1. 打开CAD软件，并进入绘图界面。

2. 输入命令“PE”以启动多段线命令。请根据您的具体需求和CAD版本选择适合的操作方式。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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