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.
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.
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。
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