upper surface短语⁶⁵²⁰¹ 基本英英例句 上翼面 Noun: the side that is uppermost This sandwiched insulation roof panel consists of the upper surface waterproof mortar, down surface calcium silicate board and interlayer steel mesh and lightweight insulation material core. 这种夹芯式保温屋面板是以防水砂浆层作为上面层材料，硅酸钙板作为下面层材料，内衬批荡网与轻质保温芯材共同构成夹芯保温屋面板。 boshuo