plain concrete

on the basis of pavement construction in Harbin Intemational Airport, the cracking of mass monolithic plain concrete ground surface is analysed carefully.

结合哈尔滨国际机场跑道、停机坪，飞机维修库地面施工，正确地分析了大面积无筋混凝土整体地面施工阶段的裂缝出现的原因是变形变化引起的。

Zihua oil bean was taken as experimental material to compare with Jiangjun oil bean,Wujinjia oil bean and Shuangfen No.

以昌黎地区主栽菜豆品种将军油豆、无筋架油豆和双丰3号为对照,研究了紫花油豆的生长发育特性。