预: in advance; beforehand法: law预拱: camber预拱度: pre-camber纯拱法: independent arch method尖拱法封顶: closure by wedging-in crown先墙后拱法: side wall first lining method; wall in advance of arched roof tunneling method横向悬砌拱法: laying arch by transverse overhanging method预构建: prebuild预购: purchase in advance 预购某物 make the purchase for sth. in advance; 我们对预购的物品很满意。 we are pleased with our purchases in advance.; 预购定金 advance payments for future purchases; 预购合同 forward purchasing contract预购船票: booking passage预供滑油低压报警: pre-supply l.o. low-press alarm预购定金: advance payments for future purchases; down payment; earnest money预根式: preradical预购股票价格: exercise price预给时间: preset time
