查询词典 concave line

Spikelets lanceolate to narrowly oblong, dorsally compressed; callus short, bearded, hairs usually less than 1/2 spikelet length; glumes cartilaginous to leathery; lower glume flat or slightly concave, hairy, back veinless or inconspicuously veined, flanks rounded in lower half, keeled toward apex, acute to truncate; upper glume boat-shaped, 1-keeled down midline; lower floret reduced to an empty hyaline lemma, rarely absent; upper lemma linear to oblong, occasionally broader, shortly 2-toothed or 2-lobed to middle, awned E.

小穗披针形的到狭长圆形，背压扁；胼胝体短，具髯毛，不到1/2的小穗长度的通常毛；颖片软骨质的到革质；更下部的颖片平或稍凹，有毛，背无脉或不明显，侧面圆形在下半部，龙骨状向先端，锐尖到截形；舟状的上面颖片，沿着midline龙骨状的1；更低的小花退化至一空的透明的外稃，很少无；上面外稃线形到长圆形，偶有宽，2齿或2裂的至中部，具芒的E。

Sessile spikelet 3.5–4.5 mm, pallid; callus hairs 1/8 spikelet length; lower glume oblong-lanceolate, membranous, back slightly concave, villous except near apex, veinless between keels, upper keels smooth or pectinate-scabrid, apex narrowly truncate or 2-toothed; upper glume apex with 2–2.5 mm awn; upper lemma narrow, 2-toothed in upper 1/4; awn ca.

无梗小穗3.5-4.5毫米，灰白色；胼胝体毛1/8的小穗长度；长圆状披针形的下部的颖片，膜质，背稍凹，除近先端之外的具长柔毛，上面颖片先端具2-2.5毫米芒；在上面1/4里狭窄，2齿状的上面外稃；芒约1厘米，柱子具短缘毛。

Capsule 1.4-2(-2.4) cm; columella 1.4-2(-2.4)× 0.5-0.8(-1) cm, concave with apical scarring; valves dark brown to blackish brown, rough, verrucose, with conspicuous and often ovoid 0.3-2 × 0.4-1.3 mm rusty lenticels.

蒴果1.4-2(-2.4)厘米；轴柱1.4-2(-2.4)* 0.5-0.8(-1)厘米，顶端具凹痕；裂爿暗褐色到微黑棕色，粗糙，瘤状，具明显的通常卵球形 0.3-2 * 0.4-1.3 毫米锈色的皮孔。

The main research works of the project are focused on the ball track with a big curvature concave cambered surface, especially the fundamental theory, method , mechanics, and process parameter optimization about ultra-precision abrasive band polishing for ball track of inner aperture.

本项目主要研究轴承滚道这种大曲率凹弧面，尤其是针对内孔滚道的超精密砂带研抛的基础理论、方法、机理及工艺参数优化。

Applicability: for different specifications of the main device labels: well-known brands use imported components, the unique advantages of stable and reliable: one can be affixed to many standard (up to 20) can be affixed to many objects, and pasted after automatic cartoning, be affixed to objects shape: round, cylindrical, oval, square, triangle, flat, convex, concave, polygonal, and back on three sides, such as the Customer Service ......

适用性：用于不同规格的标贴物主要器件：用进口知名品牌器件，稳定可靠独特优势：一次可贴多标（最多可20个）多物可同时贴，贴完后可自动装盒，被贴物形状：圆形、圆柱形、椭圆形、方形、三角形、平面、凸形、凹形、多角形、正反面、三面等

In order to improve the processing results of superfine comminuting mill with turbulence, it necessary to cognize the flow field frame and flow state in the concave.

为了认识湍流怒细粉碎机粉碎腔内的流场结构和流动状态，文中以湍流超细粉碎机的实验设备为基础。

Like drawing 1, concaves assembly is composed of adjustment sleeve, concave, while mantle assembly is composed of main shaft, mantle head, mantle.

喜欢绘画1 ， concaves 大会是由调整套，凹，而地幔组成的大会主轴，幔头，地幔。

As the results, the surface with appropriately designed regular concave had better lubrication behavior, otherwise, the lubrication behavior would be worsened if the concaves were too large or small.

给出了一个研究规则凹坑对表面摩擦性能影响的三销环试验方案，考察了面接触下不同尺寸的规则凹坑对表面润滑性能的影响。

The results show that the concave structure ameliorates the surface stress distribution of the non-smooth sample, makes the local stress between concaves less apparently than that of the smooth sample, that means the local low stress areas are formed on the non-smooth surface.

结果表明：在受力状态下，仿生非光滑凹坑改善了试样表面的应力分布，使非光滑试样表面凹坑间的区域局部应力明显小于光滑试样表面的应力，即产生了局部低应力区。

The results show that the concave structure ameliorates the surface stress distribution of the nonsmooth sample,makes the local stress between concaves less apparently than that of the smooth sample,that means the local low stress areas are formed on the nonsmooth surface.

结果表明：在受力状态下，仿生非光滑凹坑改善了试样表面的应力分布，使非光滑试样表面凹坑间的区域局部应力明显小于光滑试样表面的应力，即产生了局部低应力区。

More direct, directer ; most direct, directest

径直的，笔直的

Do you know how to use a chain saw?

你知道如何使用链锯吗？