total-head orifice 总压头喷嘴
constant-head orifice turnout 常水头孔口式斗门
constant head orifice turnout 常水头孔口式配水闸
loss of head at orifice 缩孔压头损失
head end orifice 油缸头部节流孔
According to hydraulic principle, the change of efficient water head, discharge coefficient and discharge of orifice along porous pipes have been discussed and checked by experiments in this paper.
运用水力学原理，对多孔配水管孔口出流量公式的孔口作用水头、孔口流量系数及沿程孔口出流量的变化问题进行了理论分析和试验验证。
The first orifice plate 3 and the second orifice plate 6 are separated from each other in the liquid discharge direction of the discharge head 10 and disposed opposite to each other.
第一孔板(3)和第二孔板(6)沿着排放头(10)的液体排放方向彼此分开并且彼此相对地设置。
Three layers network topology is adopted. The input variables are water pressure, diameter of orifice, diameter of abrasive particles, flow rate of abrasive and feed rate of cutting head respectively.
模型采用三层结构，输入变量有水射流压力、水喷嘴直径、磨料粒子粒度(直径)、磨料流量和切割头进给速度。
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