Additional supply duct section.
附加送风管道部分。
The air supply principles, structural features of the static pressure air supply duct are described.
介绍了静压式送风风道的送风原理、结构特点，并对该风道进行了结构分析。
Additional supply duct section. Supply or return duct can be specified. Single - or double-line ducts can be specified.
附加送风管道部分。可指定送风管道或回风管道。可以指定单线管道或双线管道。
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