汽轮机叶片制造中，叶片叶型的内弧、背弧形状通常是使用样板来检验的。
Inner arc and carry arc of the blade have been tested by the model in processing steam turbine blade.
叶背毛为较稠密的长柄树状毛、长柄叉状毛、长柄单枝毛和长柄、腺细胞大的粘性腺毛的泡桐为高度抗病。
Leaves with dense long stalk dendroid trichome, long stalk forked trachoma and long stalk trichome with big glandular cells were resistance to the disease.
动叶尾迹强度明显减弱，叶背流动分离得到抑制，叶尖泄漏涡也得到了周期性的抑制。
The intensity of rotor wakes was reduced, flow separation on rotor suction side was suppressed and the tip leakage flow was suppressed periodically.
假设桨叶以高速旋转进入、离开水面，叶背充满空泡，随边后空泡腔延伸到水面。
It is assumed that the blade of the partially submerged ventilated propeler enters and exits from water at high speed.
叶背有无叶毛和叶毛类型的不同对丛枝病的抗性有很大差异。
Resistance to witches' -broom disease was different among different type of leaves.
褐背小萤叶甲是烟田蓼科杂草的重要天敌，对蓼科杂草具有良好的自然控制作用。
Galerucella grisescens is an important natural enemy which could significantly control Polygonaceae weeds in tobacco fields.
目的探讨足背多叶皮瓣的临床应用价值。
Objective To research the possibility and the clinical applied value of the dorsalis pedis splitting flap.
方法扫描电镜下比较观察川渝商品金银花原植物叶背特征。
MethodsThe scanning election microscope (SEM) was used to compare the characters of the original plant leaf lower epidermis of the commercial Flos Lonicera.
当它获得充裕的阳光时，株型会趋于更矮小和紧凑，叶片呈现出更加鲜艳的色彩，尤其是叶背紫色的一面。
When it receives sun it tends to stay smaller and more compact and the leaves exhibit a much more intense colouring - especially on the purple undersides of the leaf.
单瓣深紫到蓝色花，细的白色镶边。中绿色蛋形叶，叶面光滑多毛，锯齿叶缘，红色叶背。迷你型。
Single purple - blue / thin white edge. medium green, ovate, glossy, hairy, serrated / red back. miniature.
旋叶式压缩机的背压对滑片的运动及压缩机的性能有很大的影响。
The vane slot backpressure has great influence on vane behavior and compressor performance.
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.
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.
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