Video: 0078_assemble_puzzle_3
Phase transition: merge
State before: solid:non_particulate:rigid body
State after: solid:non_particulate:rigid body
Object: In the process of assembling the puzzle, the puzzle piece which on the left side of the table in the initial frame
目标物体: 在拼图过程中，位于初始帧中桌面上的靠左的拼图块