flexible cover meaning in English

挠性封面纸
柔韧封面纸
软封面纸

This paper presents the experimental results of typical elements of field works such as reinforced concrete beams , fiber glass reinforced plastic honeycomb sandwich plates , flexible covers ; examines the interrelationship of the loads and deformation under the condition of large deformation ; obtains the laws governing the interaction of the medium and the structure ; solves the design and calculation problems related to shallow buried structures in soil
本文在对大量试验资料进行整理和作了大量分析计算的基础上，选取了野战工事中有代表性的构件即钢筋混凝土梁，玻璃钢蜂窝夹层梁式板和帆布被复作为研究对象进行试验研究。深刻地考察了大变形条件下荷载和变形之间的内在关系，进而掌握了介质与结构相互作用的规律，较好地解决了土中浅埋结构的设计计算问题。