Commissioning Engineers in Clayholes #Clayholes https://t.co/mKAc33HxCk
Commissioning Engineers in Clayholes #Clayholes https://t.co/mKAc33HxCk
— Commission Engineers (@hvacengineersuk) November 29, 2019
source https://commissioningengineers.tumblr.com/post/189371024800
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