And the development and formation of the sieve tube elements of the different cultivars were influenced by the different levels of B: the sieve tube elements of the two cultivars were not formed at the level of 0.001mg/L; At the level of 0.01mg/L, the sieve tube elements of the high efficiency (Qingyou 10) cultivar could be formed, but the structure of the sieve tube elements was not complete, and the abruption and differenciation of the sieve tube elements of the low efficiency cultivar were inhibited, they were not formed; At the level of 0.01mg/L, the sieve tube elements of the two cultivars were formed.

不同硼水平下A片集合，不同硼效率甘藍(lán)型油菜品種根尖篩管分子的發(fā)育與形成受到影響：硼濃度為0.001mg／L時(shí)，兩個(gè)油菜品種都不能形成篩管分子怡红院精品视频在线观看极品；硼濃度為0.01mg／L時(shí)黄色网站久久久，硼高效品種青油10號(hào)篩管分子可以形成，但結(jié)構(gòu)受到破壞美女裸无遮挡免费网站A片，而硼低效品種Bakow篩管分子的分裂與分化受阻一级毛片免费看全过程，幾乎不可能形成成熟的篩管分子；硼濃度為0.5 mg／L時(shí)欧美黄免色，兩個(gè)油菜品種都能正常生長(zhǎng)發(fā)育欧美黄色淫荡人妻。

objectiveto explore the drain way to tear with inferior lacrimal passage ruined critically.methodsthe special silicon tube whose bore 1mm and diameter 2mm was inserted between conjunctival sac and nasal vestibule,the tube was placed under the soft tissue of bucco-nasal groove and in the surface of the protrusion of upper jaw bone.resultsthere were 32 patients who undergone tube above five years.one patient of them was pulled out the tube because of papilloma hyperplasia,the other patient was pulled out the tube with the tube slide below,and the rest 30 patients kept the drain well and co

目的探討下淚道破壞嚴(yán)重時(shí)淚液引流途徑。方法在結(jié)膜囊-鼻前庭間安置一個(gè)內(nèi)徑1mm18岁亚洲美女搞黄、外徑2mm的特制硅膠導(dǎo)管亚洲国产日韩在线一区，此管置于鼻頰溝軟組織下，上頜骨前突表面谁有国产A片网站。結(jié)果治療32例又粗又长水又多免费视频，觀察5年以上，其中1例因結(jié)膜乳頭狀瘤增生而拔管黄p网站免费网站在线，1例因?qū)Ч芟禄喂埽?0例引流良好欧美极品视频，病人亦能耐受。本文就引流機(jī)制一级无码日韩A片视频、并發(fā)癥曰批A片、機(jī)體耐受問(wèn)題和操作進(jìn)行了詳細(xì)地討論。結(jié)論淚道外插管是下淚道嚴(yán)重?fù)p害時(shí)淚液引流的一種較好的解決方法免费无码不卡在线播放。皮下欧美福利网址；結(jié)膜鼻腔造瘺術(shù)；硅膠導(dǎo)管

The method comprises following steps: reacting hydroxylation carbon nano-tube successively with reagent containing halogen and hydrosulphide to prepare sulfhydryl carbon nano-tube; reflowing the sulfhydryl carbon nano-tube and platinum salts in polyatomic alcohol, processing in hydrogen atmpsphere to obtain sulfhydryl anchoring platinum / carbon nano-tube catalyst; reflowing the sulfhydryl carbon nano-tube successively with the hydrochloroauric acid and the platinum salts in polyatomic alcohol, processing in hydrogen atmpsphere to obtain sulfhydryl anchoring platinum-gold / carbon nano-tube catalyst.

本發(fā)明將市售羥基化碳納米管先后與含鹵試劑和氫硫化物反應(yīng)得到巰基化碳納米管欧美成视频黑人大屌。再將巰基化碳納米管與鉑鹽在多元醇中回流男人扒开女人的腿桶到爽视频，氫氣氛中處理得到巰基錨固鉑/碳納米管催化劑。將巰基化碳納米管依次與氯金酸和鉑鹽在多元醇中回流啪啪流水视频，氫氣氛中處理得到巰基錨固鉑-金/碳納米管催化劑亚洲黄色免费在线。

The water chamber takes the shape of tilting cube, in favor of uniform distribution of cooling water on tube plate surface. The tube bundle is divided into two groups of zygomorphy according to the bisection system and it has eight support clapboards. The siphonopore center of each clapboard increases a certain distance corresponding to that of two tube plates and the cooling tube takes the shape of arch. The two-way cooling water of bisection flows through the condenser in opposite direction so as to improve the distribution of heat load for tube bundle. Around the throat of condenser, the final stage low-pressure heater, air extraction tube, intake device of bypass exhaust and the like are deployed.

它的特點(diǎn)是：水室呈傾斜立方體形狀，有利于冷卻水流在管板面上均勻分布日韩精品第四页在线观看网站免费；由于采用對(duì)分制自拍日韩动漫欧美视频网站，管束相應(yīng)地分為左a黄色视频在线观看免费、右對(duì)稱(chēng)的兩組，并且管束設(shè)有八塊支撐隔板日韩福利在线视频播放网站，每塊隔板的管孔中心相對(duì)于兩端管板的管孔中心依次抬高一定的距離日韩激情福利小说视频在线观看网站，以使冷卻管呈拱形狀；對(duì)分制的兩路冷卻水以相反方向流過(guò)凝汽器www日本黄色，從而改善管束的熱負(fù)荷分布日日天干夜夜人人添97；在凝汽器喉部布置了末級(jí)低壓加熱器，抽汽管道及旁路排汽接受裝置等AV资源在线免费观看。

Wherein, the handle is formed by the hand-holder and a handle tube with adjustable length; the machine body has a handle mounting part and several parts inside it to filter the foreign matters of air; the fixing plug can fix handle tube on the machine body; the handle guider can guide the handle tube on one side of machine body and it is formed by the inner guider at the back of machine to cover the front of handle tube and a outer guider outside the inner guider to cover the back of handle tube, while the inner and outer guiders have protective element to avoid their damage caused by the friction between them and handle tube.

把手由手握部和可調(diào)整長(zhǎng)度的把手導(dǎo)管構(gòu)成99国内精彩视频；機(jī)身形成有把手安裝部，并內(nèi)置多個(gè)部件而過(guò)濾空氣中異物日韩va亚洲va欧美va久久；固定插座將把手導(dǎo)管固定在機(jī)身上亚洲一区国产精品老牛；把手導(dǎo)向在機(jī)身的一側(cè)引導(dǎo)把手導(dǎo)管移動(dòng)。把手導(dǎo)向由在機(jī)身后面包住把手導(dǎo)管前面的內(nèi)側(cè)導(dǎo)向和在內(nèi)側(cè)導(dǎo)向外側(cè)包住把手導(dǎo)管后面的外側(cè)導(dǎo)向構(gòu)成欧美在日韩一区线观看。這樣的內(nèi)側(cè)導(dǎo)向和外側(cè)導(dǎo)向還配備保護(hù)部件女人天堂AV社区综合网，防止內(nèi)側(cè)導(dǎo)向和外側(cè)導(dǎo)向與把手導(dǎo)管摩擦而受到損傷。

One DHL water-fire tube boiler with angular tube structure has been introduced,which is a new type boiler improved from DZL water-fire tube boiler with upper or lower shell. It has characteristics of both DHL angular tube type water-tube hot water boiler and DZL water-fire tube hot water boiler.

介紹了一種采用角管結(jié)構(gòu)的DHL型水火管熱水鍋爐結(jié)構(gòu)特點(diǎn)黄色网站在线入口大全，它是繼DZL型上置鍋殼的水火管鍋爐和DZL型下置鍋殼的水火管鍋爐之后出現(xiàn)的一種新型水火管鍋爐十八女毛片一区二区三区，它兼具DHL型角管結(jié)構(gòu)水管熱水鍋爐和DZL型水火管熱水鍋爐的特點(diǎn)。

The highest heat transfer coefficient for air flowing in the nine 3-D IFT with staggered arrangement fins is No9 tube. In the turbulent region, the heat transfer coefficient of No9 tube is a factor of 10.36 compared with smooth tube, and its thermodynamic performance coefficient is as high as 6.49; The average Nusselt number in the most superior 3-D IFT with staggered arrangement can be increased by about 1.04 times in the laminar flow, and 6.38 times in the transitional flow as compared with that in the smooth tube. The friction factor between fluid and tube wall can be 0.96 times in laminar flow, and 12.68 times in transitional flow as compared with that inside the smooth tube.

在進(jìn)行實(shí)驗(yàn)的九根肋叉排三維內(nèi)肋管中一级特黄性色生活片一区二区，換熱最強(qiáng)的No9管與光管相比国产啊a片视频在线，在紊流區(qū)的換熱強(qiáng)化比平均可達(dá)10.36倍，阻力增大比約為4.06倍少妇人妻精品中文在线有码，其熱力性能系數(shù)高達(dá)6.49；在過(guò)渡流區(qū)的換熱強(qiáng)化比平均可達(dá)6.38倍日韩免费福利漫画网站大全，同時(shí)阻力增大比約12.68倍久久aa毛片免费播放；在層流區(qū)的換熱強(qiáng)化比為1.04倍，而阻力增大比僅約0.96倍在线看性爱视频网站。

Finite element method and nonlinear regression method is used to discuss the relationship of Y shape steel tube joint's local translational displacement and local translational stiffness to the ratio between the width and the thickness of main tube, ratio of width and thickness between branch tube and main tube and included angle between branch tube and main tube's the axial directions.

本章分析了Y形方管節(jié)點(diǎn)的平動(dòng)位移和平動(dòng)剛度隨主管寬厚比WWW.国产2000AV、支主管寬度比、支主管厚度比和支主管軸線夾角等參數(shù)的變化關(guān)系a毛av免费，并從各回歸方程及回歸系數(shù)的顯著性檢驗(yàn)可知回歸方程的準(zhǔn)確性激情毛片无码专区。

Seamless steel pipe unit: The steel pipe straightening machine, the puncher, the company roll over the unit, the company tube rolling train, two roller cold tube rolling trains, the cold-drawing machine, three roller tube unit, five roller cold tube rolling trains, the cyclical tube rolling train, the automatic tube rolling train, the top pipe unit, the steel pipe extrusion unit, the tensity reduce processing process units and so on the diameter machine and so on each kind of steel pipe finishing equipment and so on...

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