摘要
对松籽几何特性，运动中状态变化与约束关系进行了实验研究．结果表明：横向实施约束可使松籽（被严格控制）达到完全相同状态．
The geometry characteristic of pine-nut. relation betweem the statechange of one in moving and restrain was studied by experments. Resultsshow:horizontal restrains can make pine-nut have completely indentical state.
