2.the floors were constructed by laying down precast concrete blocks.
地面通过铺设预制混凝土块建成。
3.In harbour construction, precasting caissons with slipform construction technology is a new attempt.
港口施工中,利用滑模工艺预制一种新尝试。
4.The technique of pier integral precasting at the sea was researched and applied in the innavigable section construction of Donghai Bridge(the first bridge at the sea in China).