Set the Pen Tool (P) to Paths in the options bar, then draw a closed path to encompass the model as indicated in yellow.
选择钢笔工具(P),路径模式,画一条如图中黄线所示的封闭的路径将模特包住。
A long square or hexagonal steel bar with a hole drilled through the middle for a fluid path.
长的四方型或六边型钢管,在其中心为孔,以便作为流体流动的通道。
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