The stoma density of diploid is thicker than spur type.
二倍体气孔密度大于三倍体，普通型大于短枝型。
A movable bed model test was carried out to study the flow diversion efficiency and local scour of a new-type submerged spur of sheet piles.
为研究新型板桩潜坝导流功效与局部冲刷问题，进行了针对性的动床模型设计。
A pair of spur gears for mounting on parallel shafts are the most common type of gears, which have straight teeth.
安装在两根平行轴上的直齿轮最常见的齿轮，这种齿轮带直齿。
An Involute spur gear enveloping worm drive which is a new type of worm drive is described in this paper.
本文所述渐开线直齿轮包络蜗杆传动，是一种新型蜗杆传动。
The most common rotary-pump designs used today are spur-gear, generated-rotary, sliding-vane, and screw pump, each type has advantages that make it the most suitable for a given application.
今天最常用的旋转泵是外齿轮泵、内齿轮泵、摆线转子泵、滑动叶片泵和螺旋泵。每种类型的泵都有优点，适合于特定场合的应用。
The most common rotary-pump designs used today are spur-gear, generated-rotary, sliding-vane, and screw pump, each type has advantages that make it the most suitable for a given application.
今天最常用的旋转泵是外齿轮泵、内齿轮泵、摆线转子泵、滑动叶片泵和螺旋泵。每种类型的泵都有优点，适合于特定场合的应用。
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