发明授权
US09441852B2 Prefabricated, modular, fire resistance and non-fire resistance rated ventilation duct assembly with integral subducts 有权
预制,模块化,耐火和不耐火的额定通风管道组件,具有整体式底座

Prefabricated, modular, fire resistance and non-fire resistance rated ventilation duct assembly with integral subducts
摘要:
A prefabricated, modular, duct assembly comprising a main duct having an outer wall, an inner wall, a first end and a second end. A horizontal duct assembly extending through the main duct between the first end and the second end. A vertical duct assembly extending along the inner wall from the horizontal duct assembly to the first end.
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