branch duct（支通风管）是什么意思？音标发音+图解场景

支通风管 /ˈbɹantʃ ˈdʌkt/ n

English: branch duct · 支通风管

释义：Duct, usually made of sheet metal, carrying the hot air toward the registers.

这个词出现在以下图解场景（1）