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What (ACN) mean in hap ??

Engineering HVAC
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Question added by jan ibrahim , site engineer , SMG
Date Posted: 2015/06/30
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magdy abd al nour
by magdy abd al nour , HVAC Site manger , First United Co.

it  mean air clearance number.....you usually have fog in the city for example

Muhammad Arsalan Siddiqui
by Muhammad Arsalan Siddiqui , Associate Director (MEP) , JLL

Its Air Clearance number for fog as well as dust

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