Video: 0050_twist_mop_1
Phase transition: twist
State before: solid:non_particulate:flexible body
State after: solid:non_particulate:flexible body
Object: In the process of twisting the mop, the mop which is being twisted in the initial frame
目标物体: 在拧干拖把过程中，位于初始帧中拧干的拖把