主结构构件的耐火限度
fire-resisting limit of main structural member
小型预制构件
small precast element
Small prefabricated piece
预制构件
prefabricated components
prefabricated part
precast element
prefabricated component
prefabricated member
precast concrete element
PRECASTING
precast reinforced concrete member
precast segment
prefabricated unit
precast unit
building block
prefab
被美术馆环绕的工厂
An Manufactory Surrounded by Art Galleries
变速箱液压操纵机构的工作
transmission hydraulic control operation