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。

If a pipe is folded accidentanlly, use a torch lamp to heat it gets transparent and then cool it to have it turned to previous from by its restoring nature.

youdao

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。

If a pipe is folded accidentanlly, use a torch lamp to heat it gets transparent and then cool it to have it turned to previous from by its restoring nature.

youdao