定时受提升阀重量，弹簧振频，提升阀阀程，活塞速度以及活塞直径的影响。
This timing is affected by the relationship among poppet weight, spring rate, poppet travel distance, plunger speed, and plunger diameter.
所述定位装置还包括用于升高和降低所述外气缸的提升装置，所述提升装置包括与所述活塞相连的带螺纹驱动机构。
The positioning apparatus also includes a lifting device for raising and lowering the outer cylinder. The lifting device includes a threaded drive mechanism coupled to the piston.
并且使提升管反应器的流型更加接近活塞流，进一步减少返混。
The flux in the riser reactor is close to plug flow, which greatly demotes the back mixing.
并且使提升管反应器的流型更加接近活塞流，进一步减少返混。
The flux in the riser reactor is close to plug flow, which greatly demotes the back mixing.
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