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。
A method that USES two degrees of freedom (DOF) auxiliary mechanisms to path synthesize a five-bar mechanism was presented after analyzing the posts and inverted solutions of the five-bar mechanism.
对平面二自由度五杆机构的位姿形式及位置逆解进行分析之后，提出了用二自由度辅助机构进行全铰链五杆轨迹机构综合的方法。
In this paper the geometry properties of the plane four-bar linkage which can generate a symmetric path are discussed.
讨论了能够产生对称连杆曲线的铰链四杆机构的几何特征。
In this paper the geometry properties of the plane four-bar linkage which can generate a symmetric path are discussed.
讨论了能够产生对称连杆曲线的铰链四杆机构的几何特征。
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