They can produce a "ball valve" effect by intermittently occluding the atrioventricular valve orifice.
他们可以产生“球阀”效应，引起房室瓣口间歇性关闭。
Clearly, the effect of this must be taken into account when the orifice plate dimensions are determined.
显然，这种效果，必须考虑到当孔板方面的决心。
In the paper, the effect of the die orifice dimension on output and working pressure is analyzed.
分析了模孔尺寸对机器产量和工作压力的影响。
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