It used in straitness field, soft earth layer and instability aquiclude.
主要适用于场地狭窄、软弱土层和不稳定含水土层中的施工。
2
Ureter straitness, contortion and stone transferring are of important factors influencing on operation outcome.
输尿管狭窄、扭曲、术中出现结石移位是影响手术结果的重要因素。
3
In present day, straitness of germplasm resource stands the way of maize breeding in China. So, new germplasm and expanding use of germplasm resource arc required.