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.
一方面给出了检测门的物理结构设计，另一方面重点研究了检测门的同步升降控制系统。
On the one hand, Design the physical structure of beam-type ship draft testing gate, On the other hand, Focuses on the detection of synchronous lifting the door control system.
一方面给出了检测门的物理结构设计，另一方面重点研究了检测门的同步升降控制系统。
On the one hand, Design the physical structure of beam-type ship draft testing gate, On the other hand, Focuses on the detection of synchronous lifting the door control system.
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