1. The fuselage is made of steel and dealed through limitation, guaranteeing its fuselage's good rigidness, not transformed easily. 机身采用先进的钢结构设计，经过时效处理，保证其机身有良好的钢性，不易变形。
2. For general multi-rigid model system, only the locomotion parameter of the components with large rigidness and regular shape could be represented. 一般的多刚体系统模型，比较适合于反映构件刚度较大的机构的运动与动力参数。
3. PP Characteristic:Good heat resistance, high chemical stability, high rigidness, good extensibility&bending resistance , and good electrical insulation. PP特性：耐热性好，化学稳定性高，刚性大，延伸性，抗弯曲性好，电绝缘性佳。
英英解释
n.
1. the physical property of being stiff and resisting bending
2. the quality of being rigid and rigorously severe
