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並前往https://www.airah.org.au/Content_Files/HVACRNation/2009/June2009/HVACRNation2009-06-01.pdf

Basics of Duct Design - AIRAH

low-pressure air conditioning ductwork. • For air quantities greater than 4500 l/s size duct ... than fitting should be included in the duct section.

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