If a pipe is folded accidentanlly, use a torchlamp to heat it gets transparent and then cool it to have it turned to previous from by its restoring nature.
有折曲时可用喷灯均匀加热至透明后进行冷却，则由于材质特性可恢复到原来状态。
2
It is a homemade lamp, light, high above his head, like a small torch.