Once you've dragged out your path, select the Pen Tool (p), right-click inside the rectangle, and then choose to Make Selection.
路径画好之后，选择钢笔工具(P)，右击矩形内部，选择建立选区。
Pick the Direct Selection Tool and click on the shape path. Click the vertical point and drag it down while holding the Shift key until it reaches the same level with the horizontal axis.
用直接选取工具单击这个图形的路径，单击垂直点然后按住shif t键往下拉直到如图所示状态。现在看起来不错了，但是还是比较简陋。
Pick the Direct Selection Tool, right click the path you've just created, and choose Stroke path.
选择直接选择工具，右键单击刚刚创建的路径，选择描边路径。
The clamping means, cutter selection, tool path planning and cutting parameters determination using three-axis machine for aluminum windshield pieces were studied.
研究了风栅铝片三轴铣削加工中装夹方法、刀具选择、走刀规划以及切削参数确定方法；
The clamping means, cutter selection, tool path planning and cutting parameters determination using three-axis machine for aluminum windshield pieces were studied.
研究了风栅铝片三轴铣削加工中装夹方法、刀具选择、走刀规划以及切削参数确定方法；
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