The valve is driven directly by a large strake multilayer piezoelectric stack, its displacement actuates the power cascade spool after amplification by a lever mechanism.
该阀采用大行程的压电叠堆作为驱动元件，经杠杆放大后的位移直接驱动功率级滑阀。
The instantaneous opening of the vent valve in the opening process is large and the spool movement is affected by the stop device.
排油阀开启过程瞬时开度大且阀芯运动受限位装置影响。
Also, there is a large hole in the center of the base, corresponding to that in the spool.
另外，有一个在该基地中心的大洞，在后台对应的。
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