cut-off function 截断功能
The bottom of the disc is made of knife-shaped gate with a cut off function of the medium. When gate is closed, oblique plane of gate valve encounters wedge block of gate to achieve sealing effect.
闸板底部做成刀形斜面具有切断介质功能，而且闸板关闭时通过阀体上的锲块紧靠闸板斜切面使得闸板紧紧贴靠阀座密封面，从而起到了密封效果。
Because of the continuity of the flow, the stream function is introduced and it makes that the numbers of the fluid dynamical basic equation is cut off one.
由流动的连续性引进了流函数，使流体动力学基本方程的未知量的个数减少一个；
Using full vector orthogonal function model of the auxiliary air hole pattern of cut-off characteristics of optical fiber were discussed.
利用全矢量正交函数模型对空气孔辅助光纤的模式截止特性进行了讨论。
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