TBprecast concrete is already formed into the shapes needed to build something 〔混凝土〕预浇的，预制的
Examples from the Corpus
precast• Most popular are precast concrete paviours and slabs, but look around for the more interesting surface textures and designs.• Crisp precast concrete slabs are teamed with brick, the latter helping to soften the overall surface.• The four zones are contained within a single reinforced concrete structure made both with concrete cast in-situ and precast concrete.