sieve tube

Although the sieve tubes are not cut off directly during tapping, the outer part of the sieve tube layer at/ near the tapping cut will be collapsed as a result of the damaging effect from tapping.

虽然割胶时不直接切断筛管，但是在割口及其附近，筛管层外层的筛管在伤害的影响下毁坏。

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Line canal is by make shoe, bushing, sieve tube , buckle the composition such as pipe nipple.

衬管是由引鞋 、 套管 、 筛管 、 倒扣短节等组成.

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The mechanical property of three inflation sieve tube base tubes was influenced by well temperature in different extent.

即，三种膨胀筛管基管材料的力学性能都不同程度地受到井下温度场的影响。

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Sieve tube design includes the design of the distribution density and the size of the hole.

筛孔的设计主要参数包括筛孔大小和分布密度。

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The effects of different level bentonite on the content of soil water and soil organic matter in the field are studied with the sandy sieve tube method.

通过田间条件下砂滤管试验，研究了不同膨润土施用量及有机物料对砂土土壤含水量和有机质含量的影响。

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They had fearfully marked negative correlation between the ratio of phloem area/ transect area and length of node; fearfully marked positive correlation between sieve tube density and length of node;

韧皮部面积/横断面积比值和筛管密度与节间长度分别呈极显著负相关和正相关；

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The tracheid and sieve tube elements are all differentiated from the procambia in the center of the haustoria, and the former occurs prior to the latter.

吸器中管胞和筛管都是从吸器中央具有原形成层特性的细胞分化的，管胞的分化先于筛管，或同时进行。

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The dorsal vascular bundle, which was composed of centered vascular bundle and circumjacent sieve tube, showed wide to thin from bottom to top.

从整体上看，两品种颖果背部维管束表现为从基部到顶部由粗到细的管-束状结构，由居中的导管束和周边的若干筛管束构成。

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The sieve tube members in the minor leaf vein are differentiated through the formation of the P-protein body, the function of the lysosome in the vacuome and the secretion of the dictyosome.

小脉筛管分子的分化是通过P-蛋白体（P-protein body）的形成和液泡系的溶酶体作用，并伴之以高尔基体的分泌作用。

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By means of analyzing the structure and the motion and the motive force of beater, the calculating formulae of the gap between beating plate and the inner wall of the sieve tube and the turn staying time of material in the sieve tube have been deducted.

通过对打浆机结构、运动及动力分析，导出了打浆板与筛筒壁之间的间隙以及物料在筛筒中旋留时间的计算公式。

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In type ⅰ, as seen in 5 species of Euonymus, the sieve tube elements have more inclined end walls and numerous sieve areas ( compound sieve plates), phloem rays are almost uniseriate.

类型Ⅰ：筛管分子端壁倾斜，筛域数多，都为复筛板，韧皮射线大多为单列。卫矛属（Euonymus）的5种植物属于这一类型；

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The other type of cells located at both ends of the spindle which possess an intermediate form between the filiform cell and the normal sieve tube.

另一类是位于纺锤体两端、形态介于线条形细胞和正常筛管分子之间的细胞，此类细胞两端的端壁形态不同。

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The utility model relates to a corundum sieve tube used in the field of oil field and oil well production.

本实用新型涉及油田油井开采领域中用到的一种刚玉筛管。

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Optimization design of new anti-sand sieve tube based on hybrid genetic algorithm

基于混合遗传算法的新型防砂筛管优化设计

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And then to design of drilling sieve tube connectors for finite element analysis.

然后对设计的钻井筛管接头进行有限元分析。

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The sieve tube elements of the secondary phloem were relatively shorter, with simple sieve plates in the slightly inclined to almost horizontal end walls.

韧皮部筛管分子相对较短，其端壁水平或略倾斜，具单筛板，缺少纤维。

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The secondary phloem mother cell were divided and differentiated into sieve tube, companion cell, libriform fibre, parenchyma cell, and a few sclereid cells, The sieve tube and companion cell was originated from inequality mitosis of sieve mother cell.

维管形成层韧皮部母细胞分裂分化形成筛管、伴胞、韧皮薄壁细胞、韧皮纤维和少量的石细胞，筛管和伴胞来源于筛管母细胞的不均等有丝分裂。

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Companion cells arrange in a row or single cell as long as the sieve tube member.

伴胞为与筛管分子等长的一列或单个细胞。

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In the selection and design with no less than the original casing intensity, the criteria for such strength design, through the analysis of stress and movement rules of overlying strata of drilling sieve tube structure optimization design.

在选材和设计时以不低于原有套管强度为准则，采用等强度设计，通过受力分析及上覆岩层移动规律对钻井筛管结构进行优化设计。

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Programmed Cell Death ( PCD), a physiological cell death process, is associated with the differentiation of vessel and sieve tube, the propagation, senescence, the hypersensitive reaction of plants, and so on.

细胞程序性死亡（Programmed cell death，PCD）与导管和筛管的分化、繁殖、衰老、超敏反应等过程紧密相关。

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There was no accumulation of starch grains in the sieve tube. 2 There were significant differences in physiological characteristics between the vitrified and normal apple shoots in vitro.

2苹果玻璃化试管苗的生理特性与正常试管苗有显著差异。

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Through the electronic microscope, the cells of the pathogen ( MLOs) arefound penetrating the sieve tube's cellular wall.

在电子显微镜诊断中发现有MLOs靠近寄主筛管细胞的细胞壁和穿进寄主细胞壁的现象。

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