1. The answers are as follows: (1) pad: the air duct of the secondary fresh air processed by the fresh air processor. (2) sad: air supply duct. (3) fad: an air duct that extracts fresh air (without any treatment) from outside the street. (4) rad: return air duct. 2. This is not true. What does pad sad fad rad mean in the air conditioning ventilation drawing? 1. The answers are as follows: (1) pad: the air duct of the secondary fresh air processed by the fresh air processor. (2) sad: air supply duct. Sad is an obviously minor error packet, a negligible error report, and the abbreviation of suggest not to adjust. Report is an audit report, and claer is a clean opinion report type. The audit summary is an important piece of audit work.
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Grief: This word usually refers to deep grief, especially prolonged grief caused by the loss of a loved one or a significant loss. It expresses a deep, lasting, and even life-changing emotion. sad: is a word specifically used to describe sadness.
