亚洲最大风洞试验顶门升降液压系统
The door lifting hydraulic system used in Asia's largest wind tunnel laboratory.

　　该液压系统采用特殊同心双缸来升降风洞顶门，并采用同步技术和液压锁闭技术来实现风洞顶门的升降。
　　The system makes use of the special concentric dual cylinder to lift and drop the wind tunnel door with the aid of synchronization and hydraulic locking technologies.