筛管

Aphids in the process of inhaling plant sap virus particles and auxiliary proteins also be inhaled, thus completing the process by poison, which also supports the field citrus aphid is non-persistent decline disease vector of disease, while the citrus Huanglongbing is phloem restricted by the bacteria caused the main pathogens present in the phloem, the fleas only by phloem feeding in diseased plants, pathogens in the body through the back to complete the salivary glands in the course of the next through the sieve tube feeding in the secretion of saliva the pathogens into the healthy tree, Citrus Huanglongbing different characteristics with aphid-borne diseases, Huanglongbing to persistent disease.

蚜虫在吸入植物汁液的过程中病毒粒子和辅蛋白同时也被吸入，从而完成获毒过程，这也支持了田间蚜虫是柑桔衰退病等非持久性病害传播介体，而柑桔黄龙病是由韧皮部限制性细菌类引起，病原体主要存在于韧皮部中，木虱只有通过在病株韧皮部取食，病原在体内完成循回到唾液腺中，在下一次取食过程中通过在筛管中分泌的唾液将病原体带到健树，柑桔黄龙病与蚜虫传病特点不同，黄龙病为持久性病害。

Strength analysis of slotting screen with ANSYS［J］.

基于ANSYS的割缝筛管强度分析［J］。

Given the Duri oil field adjacent to the consolidation of sand there is not serious sand greatly reduced pump rod pump efficiency, and horizontal wells using the naked eye is difficult to control completion of prefabricated sieve out the sand, so the use of horizontal wells Kulin tolerance strata of sand Rodless pump artificial lift.

鉴于相邻的Duri油田有不固结砂，严重的出砂大大降低了有杆泵泵效，而水平井采用裸眼预制筛管完井难以控制出砂，因此Kulin水平井采用耐受地层出砂的无杆泵进行人工举升。

Using image processing technology, we analyze the size and shape of cell wall crystal region of bamboo's cross section during entire growth from bamboo shoot to the mature bamboo. Using region segmentation, we study the forming and distributing characteristic of crystal regions of the fiber cap、 proto-sieve 、 thin-walled cell of vascular bundle of bamboo's cross section.

本文应用图像处理技术分析了竹材从竹笋到成竹整个生长阶段横截面细胞壁结晶区的大小及形态，并应用区域分割法研究了竹材微管束横截面中的纤维帽、筛管、薄壁细胞等各部分结晶区的形成过程以及分布特征。

Plunger core of this pump is made of metal tube with several radial holes in the middle. There is an elastic expansion sleeve on the middle screen plunger core; several wear resistance seal rings are on the expansion sleeve.

该泵的柱塞芯由中部开有若干个径向槽孔的金属管制成，柱塞上装有一个弹性伸缩套，套在中心筛管柱塞芯上，在弹性伸缩套外面套有若干个耐磨的密封环。

The food-conducting tissue of vascular plants, consisting of sieve tubes, fibers, parenchyma, and sclereids.

韧皮部导管植物的食物传导组织，包括筛管、纤维、薄壁组织和硬化细胞

There are generally 3 types of sand production: the output of inorganic profile control agent in Mongolia Oilfield (grain size between 0.05 and 3 mm); the output of cement paste with formation debris (grain size between 0.03 and 8mm) in Xilin Oilfield caused by casing failure; and the output of loose sand grains in Hanan Oilfield and Anan Oilfield.

这些出砂没有形成规模，只出现在个别的井组和单井。因此本着少投入，多产出的原则，对国内的机械防砂和化学防砂技术进行了对比，取其长处，形成了适合二连油田的筛管悬挂式防砂工艺、简易防砂管柱技术和防砂泵防砂3项技术。

They are common in many situations, for example as gland cells and epidermal cells, and in xylem and phloem parenchyma, where they are concerned with active loading and unloading of vessels and sieve tubes.

许多情况下都有传递细胞发挥作用，例如：腺细胞和表皮细胞，还有木质部和韧皮部的薄壁细胞，该处导管和筛管的主动装填和排空都与传递细胞有关。

Petroleum slotted pipe is a tool for sand prevention in the petroleum production of oil field.

石油割缝筛管是油田采油防砂常用的工具。

A new model quantifies the effect of the well inclination on the connectivity between the fracture and the well via perforations both in terms of the total skin and the screen flow velocity.

在所建立的新模型中，通过总表皮面积和筛管流动速度这两个阐述定量分析了井道倾斜对断裂面和深水井之间连接的影响。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失