The 400 series adopts durable spring and wedge block structure, suitable for overloading and long liferequirements of the occasion.
在400系列中采用耐久弹簧和楔型块结构，适用于重载和有长寿命要求的场合。
2
In the whole exercise environment, traditional outdoor sports and simple gymnastic exercises have been unable to meet the people's growing health standards and the liferequirements.
在整个大的健身环境下，传统的户外运动及简单的体操练习已无法满足人们日益提高的健康标准和生活要求。
3
The permanent waterproof measures of Beijing Metro are very important to ensure no seepage and leakage axed to satisfy transportation safety and structure operational liferequirements.