Fives' state-of the-art back-puffing technique

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https://www.fivesgroup.com/cn/%E7%89%B9%E6%AE%8A%E9%A1%B5%E9%9D%A2/%E9%A2%84%E8%A7%88

Fives experts were contacted by one of their customers in Northern Europe to unplug 4 heat exchangers, a special operation requiring numerous skills.