管

Type 1-1-1,2-2-1 and 2-2-2 account for 91 4%;The appearing rats of distal lingual canal are 24 7%;The appearing rats of double root canal orifices are as follows:Medial canal 78 3%,distalcanalIt don't ...

远中舌根的发生率为 2 4 。7%；双根管口率：近中根为 78.3%，远中根(不含远中舌根，下同)为 19.3%；双根管率：近中根为 88.3%，远中根为 2 3.3%；双根尖孔率：近中根为 5 6 。7%，远中根 8.3%，单根管口而有双根尖孔者，近中为 6 。7%，远中为 3.3%。结论下颌第一恒磨牙根管的类型复杂，充分了解其根管解剖对提高根管预备效果、减少根管遗漏有重要意义。

The raw data was processed by using axial, coronal and double oblique multi-planar reformation; Images obtained were graded in terms of quality with a 5-point scale(5=excellent, 4=good, 3=fair, 2=poor, and 1=nondiagnostic). In grading image quality at axial MPR, The radiologic specialists focused on the subarcuate fossa, tendon of tensor tympani, facial recess, vestibular aqueduct and pyramidal eminence, In grading image quality at coronal MPR, attention was given to the scute, crista transversa, fenestra cochleae, lateral malleal ligament and snake eyes signature of cranial nerve, In the grading of the image quality at double oblique MPR, the radiologic specialists concentrated on the malleus, incus, stirrup bone, upper bony semicircular and aquaeductus fallopii, and then to implement statistical analysis. In order to choose the minimum tube current values and the maximum pitch that can satisfy the diagnosis request, image quality of axial, coronal and double oblique reformation images was compared with different tube current groups. 15 ears of volunteers were used to test the validity with the scanning parameter. Subsequently noise, MTF and dose length product were measured by phantoms in different tube current and pitch, the parameters obtained were compared and taken into statistics analysis.

扫描模式使用临床常用的颞骨螺旋扫描方式：管电压120 kV，准直宽度20×0.6 mm，视野200 mm，重建矩阵512×512，旋转时间1 s/r，重建层厚0.6 mm，重建间隔0.3 mm，分别改变管电流(380、300、200、160、120和80 mA)和螺距(0.8、1.0和1.2)进行扫描和重建，然后对颞骨进行横断面、冠状面和双斜面多平面重组，于重组后的横断层面图像上选取弓形下窝、鼓膜张肌腱、面神经隐窝、前庭导水管和锥隆起5个解剖结构，冠状面重组图像上选取盾板、横嵴、蜗窗、面神经的蛇眼征和锤骨外侧韧带5个解剖结构，双斜面重组图像上选取锤骨、砧骨、镫骨、上骨半规管和面神经管5个解剖结构，在双盲的情况下由放射学专家分别对各管电流和螺距下扫描的重组图像进行评分，随后进行统计学处理，从中筛选出满足诊断要求的最低管电流值和最大的螺距，分别采用患者25例(15耳)用该管电流值和螺距验证其可行性；然后利用模体分别测试各管电流和螺距下的图像的空间分辨率、噪声及其剂量长度积，并对测试所得参数数值进行比较和统计学处理。

Barrel is the key part of artillery. In shot process, propellent gas of high pressure and high temperature flows in the tube at a high rate of speed, which brings an upheaval to the temperature field of the composite barrel. As to the composite barrel with metal inner, its poor thermal conductivity is more likely to cause uneven temperature distribution and bigger temperature gradient, to produce improper deformation and to make the work temperature of metal inner rise, all of which will affect the life span of barrel.

身管是火炮的关键部件，在火炮发射过程中，高温、高压的火药燃气在身管内成脉冲式高速流动，使身管受到急剧的加热，引起身管壁内的温度急剧变化，而对于带金属内衬复合材料身管，由于复合材料导热性能较差，更容易引起非均匀温度分布以及较大的温度梯度，产生不合适的变形，也会使身管的金属内衬的工作温度升高，从而使得身管的寿命降低，同时身管的发热会引起其刚度的变化，增大射弹散布。

To solve this problem, according to the analysis of the quality factors of the X-ray, the measurement for X-ray tube voltage/current is presented based on Q-factor and its derived QL and QH-factor when X-ray tube energy bandwidth is defined.

针对传统的管电压/管电流测量方法虽然可以检测出X射线管电压/管电流误差值，但不能反映其质量特征的状况，在分析影响X射线质量高低的因素的基础上，引入了射线管能量带宽的含义，并由此提出了基于Q值及其派生QL值、QH值的射线管电压/管电流分析方法。

The factory is a professional enterprise producing rubber hose, rubber tube varieties have; water pipes, sand suction tube, suction tube cement, heat pipe, oil pipe, acid-resistant pipes, pipe sand blasting, edible tubes, pneumatic tubes, plain hose, automotive cooling pipes, automotive rubber water hose, cars with anti-aging heat pipes, and other special-shaped rubber hose.

本厂是一家专业生产橡胶管的企业，橡胶管品种有；吸水管、吸砂管、吸水泥管、耐热管、耐油管、耐酸管、喷砂管、食用管、气压管、纯胶管、汽车散热管、汽车用输水橡胶软管、汽车用耐老化散热管、异型橡胶管等。

The structure and morphology of CNTs which have been purified and not yet, were characterized by TEM, SEM, XRD, Raman, TG-DTA, BET, IR. The results indicated that when the stokehole reaction temperature was 1170℃,the decompose temperature of Ferrocene was 150℃,he volatilize temperature of Benzene was 50 ℃, hydric flow rate was 270ml/min, the concentration of thiophene was l% and the reaction time was 20 minutes, the CNTs with single-walled and multi-walled were prepared.

结果表明：炉膛反应温度1170℃、二茂铁的分解温度150℃、苯的挥发温度50℃、氢气的流量270ml／min、噻吩体积分数1.00／100ml苯、反应时间20min时，可以得到碳纳米管，既有单壁管又有多壁管，单壁管的内径分布在0.88～1.15nm之间，多壁管的直径分布在40～120nm之间；纯化后的碳纳米管比表面积增加，管壁光滑，而且产生了大量的含氧官能团，有利于在水溶液中的分散。

Main produces:1,Piping producing equipments: 3D Digital Control Bender, Coil Straightening Guillotine, Pipe terminal Molding, Digital Control Flute Shape Pipe Machine, Digital Control Distributor Drill, Automatic Grid loading and Groove rolling Equipment, Automatic 2-end Digital Control Chamfer Equipment, Tee Flaring / Flating Equipment2,Heat Exchanger Producing Equipment: Long-U Shape Benders, Short-U Shape Benders, Horizontal Expanders3,Others: Hydraulic Pressure Single Benders, Pipe Pressing Machine, Digital Control Double-head Chamfer Machine, S-shape Feeding and Shaping Machine, Welding Machine, Hydraulic Sawing MachineWe are stick to the spirit of strict quality management, sustaining technology progress and perfect after service, service for our customers.

主要产品：1、配管加工设备：三维数控弯管机、盘管校直切断机、管端成型、数控笛形管机、数控分配器钻孔机、自动装网滚槽机、全自动双端数控倒角机、三通扩口机。2、空调换热器生产设备：长U弯管机、小U弯管机、卧式涨管机。3、其它加工设备：液压单弯机、压管机、数控双头倒角机、S形送料整形机、展架焊接机、液压锯床。

I has a total of nine series over 900 varieties of products, including: W-mouth free for the use of cast iron pipes and drainage pipe, A-type flexible interface with cast iron pipes and drainage pipe, for I used gray iron drainage pipe And pipe fittings, all kinds of high-end decorative and leakage, waterproof deodorant series of anti-theft sealed covers, stainless steel flexible Our expertise, all have carbon steel hoop Elevators, all kinds of iron and steel bucket rain water pipe, cast iron plates and various trench Bizi Non-standard pipe and tube, and other combinations.

我公司共有9个系列900多个品种的产品，其中有：W型无承口排水用铸铁管及管件、A型柔性接口排水用铸铁管及管件、承口排水用灰口铸铁管及管件、各种高档装饰地漏、防水防臭防盗密封井盖系列、不锈钢柔性卡箍、各种碳钢抱箍吊卡、各种铸铁钢制雨水斗及雨水管、铸铁地沟箅子板及各种非标管件和组合管等。

Some special features ofthe static mixer tube are demonstrated.4 An evaluation method of velocity-based disturbance effect of fluid field wasproposed. Qualitative results are obtained by using this method in fluid fielddesign and structure optimization of disturbing elements.5 Experimental models are made efficiently and accurately by RPM method.

主要内容包括： 1、总结了化工过程强化技术的现状和强化研究的途径，提出了紧凑式工业炉的概念，确定用静态混合式炉管进行局部强化。2、提出了静态混合式炉管应用的虚拟工程放大研究方法，指出研究中提高效率的关键是计算模型快速生成技术和实验模型的快速原型制造。3、对工业炉的关键部位——炉管，从材料成分、强度、制造等方面对静态混合式炉管的设计、制造进行了分析，与常规炉管对比，说明了静态混合式炉管的独特性和要求。4、应用快速原型方法，迅速、准确地得到了符合精度、强度要求的静态混合式炉管模型，产品的精度和强度完全符合要求，提高了模型制造效率。5、应用计算流体动力学方法，进行静态混合式炉管的工程放大研究。

The state-of-the-art of chemical process and equipment intensificationtechniques is reviewed. A novel concept of compact industrial furnace isproposed, in which tube with static mixer for partly intensification is determined. 2 A virtual engineering scale-up approach is put forward. The key points toimprove the scaling-up efficiency include two tools: one is rapid generationtechniques for computational models in which a re-use library is built, the otheris rapid prototyping manufacturing, employed for rapid generation forexperimental models.3 The tube is the key component for industrial furnace. Material microstructure,high temperature strength, and casting process of the tube with static mixer arediscussed as compared with those of traditional tube. Some special features ofthe static mixer tube are demonstrated.4 An evaluation method of velocity-based disturbance effect of fluid field wasproposed.

主要内容包括： 1、总结了化工过程强化技术的现状和强化研究的途径，提出了紧凑式工业炉的概念，确定用静态混合式炉管进行局部强化。2、提出了静态混合式炉管应用的虚拟工程放大研究方法，指出研究中提高效率的关键是计算模型快速生成技术和实验模型的快速原型制造。3、对工业炉的关键部位——炉管，从材料成分、强度、制造等方面对静态混合式炉管的设计、制造进行了分析，与常规炉管对比，说明了静态混合式炉管的独特性和要求。4、应用快速原型方法，迅速、准确地得到了符合精度、强度要求的静态混合式炉管模型，产品的精度和强度完全符合要求，提高了模型制造效率。5、应用计算流体动力学方法，进行静态混合式炉管的工程放大研究。

On closer examination, though, this is not a vote for multilateralism but just the opposite.

仔细审视后我们发现，这并非是对多边主义投出的赞成票，而是恰好相反。

Uncovering their weak spots, so I can defeat them.

揭露出他们的弱点，这样我就可以打败他们了。