Video: 0079_assemble_puzzle_4
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 table in the initial frame
目标物体: 在拼图过程中，位于初始帧中放在桌面上的拼图块