Select planar surface or datum plane.
任意选择一个平面。
The research approach: documents and materials, three-dimensional force-testing, planar shooting on spot, film analysis, datum statistics and expert consultation.
研究方法：文献资料法、三维测力台测试法、摄像机现场拍摄法、录像解析法、数理统计法以及专家咨询法。
The research approach: documents and materials, three-dimensional force-testing, planar shooting on spot, film analysis, datum statistics and expert consultation.
研究方法：文献资料法、三维测力台测试法、摄像机现场拍摄法、录像解析法、数理统计法以及专家咨询法。
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