叶轴是复叶的主轴。
幼叶中层既可由亚边缘原始细胞或远轴层叶肉的第一个细胞单独产生，也可由它们二者共同产生。
The middle layer of laminae is brought about either by submarginal initials of by the first cell of the abaxial layer of mesophyll alone or by both of them .
在通往内地的管道中，设三叶以上的叶轮水流轴传动用作发电或取动力。
Pipeline leading to the Mainland, located above the impeller flow trefoil drive shaft for power generation or to take power .
并且这些低频线谱基本上都是转子轴频和叶频的谐波分量。
These low frequency spectrum lines are basically the harmonics of the rotor shaft frequency and the blade-passing frequency.
介绍了节能轴支架的作用机理、设计方法和叶剖面的优化。
The working mechanism, design method and profile optimization of energy saving shaft strut (ESSS) are present in this paper.
对叶块成型芯轴的结构进行了设计改进。
The structural design of molding mandrel of pyrophillite was improved.
茎：植物体着生叶、芽和繁殖器官的纵向轴状结构。
Stem a longitudinal axis upon which are borne the leaves, buds, and reproductive organs of the plant.
本文将动量-叶素理论推广应用于计算水平轴风车叶轮有侧偏角或上仰角时的气动力。
Based on the traditional Momentum-Blade Element theory, an improved method of aerodynamic calculation about the horizontal axis wind turbine in yaw or in pitch-up is presented in this paper.
漏斗排沙方式利用螺旋流的分离机理来排除渠道泥沙； 平轴螺旋管流排沙是利用在管间加设导叶的方式产生螺旋流来输运泥沙。
The way of the sand funnel make use of separating mechanics of spiraling flow to breed out the sediment of the channel.
利用保角变换，首先在二维平面得到双曲线型的等位线簇方程，然后过渡到三维空间，从而得到表面为单叶双曲面（两实半轴相等）的带电导体的等位面簇方程。
Transition to the three-dimensional space, then we obtain the equation of equipotential surface families of charged conductor with surface of hyperboloid of one sheet.
水力部件由以下组成：出入口管，壳体，法兰，叶轮，导叶，泵轴，泵轴承，热屏和热屏热交换器。
The hydraulic section consists of the inlet and outlet nozzles, casing, flange, impeller, diffuser, pump shaft, pump bearing, thermal barrier and thermal barrier heat exchanger.
渐缩型间隙在叶片前半轴弦受到上通道涡的抑制，减少了叶顶间隙泄漏涡的强度和范围；
Suppressed by the up passage vortex at upstream side of blade, the intensity and scale of the tip clearance leakage vortex is decreased.
然后对升阻型垂直轴活叶风力机进行运动学分析和动力学分析，建立了数学模型。
Then kinematics and dynamics of lift-drag-type vertical axis wind turbine of living leaves is analyzed and mathematical model is established.
本文着重阐述了一种新型的潮流发电装置——弹簧控角竖轴直叶水轮机的工作原理和试验研究过程。
In this paper, theoretical and experimental investigation on the newly developed equipment of renewable tidal-current energy spring-control vertical-axis variable-pitch turbine is presented.
提出在开式整体叶盘的粗加工阶段，采用插铣加工代替传统的五轴数控加工点铣和侧铣，实现高效加工。
At the stage of the rough machining of the open blisk. the plunge milling is presented in stead of the traditional 5-axis NC point milling and side milling for improving the machining efficiency.
提出了一种汽轮机叶片五轴数控加工的实用方法，对于叶背和叶盆采用中凹盘形铣刀，基于密切曲率法给出优化刀位轨迹的计算方法；
This paper presents an approach to machine steam turbine blades in 5-axis NC. By means of using a disc cutter with a concave end, curvature fitting is used to machine the convex and concave surface.
对叶片的解剖学分析发现突变体中脉缺少细胞和近轴小维管束，导致披叶表型的产生。
Leaf anatomy results revealed the central vein lacks both clear cells and the adaxial small vascular bundle in dl2 mutant, which seemed to cause the drooping leaf phenotype.
对叶片的解剖学分析发现突变体中脉缺少细胞和近轴小维管束，导致披叶表型的产生。
Leaf anatomy results revealed the central vein lacks both clear cells and the adaxial small vascular bundle in dl2 mutant, which seemed to cause the drooping leaf phenotype.
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