The ground floor slab-on-grade consists of precast concrete modules with built-in voids for service (HVAC, electrical and IT, etc.) distributions.是什么意思_The ground floor slab-on-grade consists of precast concrete modules with built-in voids for service (HVAC, electrical and IT, etc.) distributions.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句