管的

AIM: To analyze the influence of Photomultiplier Tube voltage biasing circuit on the performance of PMT, and to take corresponding measures for elevating the accuracy of PMT voltage biasing circuit accuracy to improve the performance of PMT.

目的：分析光电倍增管电压偏置电路对光电倍增管性能的影响，并采取相应措施提高光电倍增管电压偏置电路的精度，以改善光电倍增管的性能。

Then sonorgraphic examination was carried out in 20 patients with cubital tunnel syndrome and 10 patients with carpal tunnel syndrome before operation.Results Not only the structure of cubital and carpal tunnel cauld be showed clearly,but also the cause of the cubital and carpal tunnel syndrome could be distinct.

结果 高频超声不仅能清晰显示构成肘管及腕管的骨质、软组织及其内容物，而且能够明确肘管和腕管综合征的病因以及尺神经和正中神经的形态学变化。

Optimized calculation shows that, the comprehensive performance of the eddying tube is better than that of the smooth tube, and the comprehensive performance of the eddying tube with minor screw pitch and proper groove depth is excellent.

优化计算表明，旋流管换热系统的传热-阻力综合性能指标优于光滑管换热系统，旋流管的螺距、槽深对旋流管换热系统的传热、压降、功率消耗等影响很大，但是小螺距、适当槽深的旋流管的综合性能是优良的。

The complications consisted of capillary hemorrhage, insertion catheter difficulty or catheter aberrance, catheter lockage, phlebophlogosis, catheter exodus and infection.

结果68例患者中留置尿管时间为14～126 d，平均39 d，因并发症而需拔管的占23.8%，主要并发症依次为：局部渗血、送管困难或导管异位、导管阻塞、静脉炎、导管脱出和感染等。

One, suck phlegmy the preparation before works 1 should make sure negative pressure attracts plant above all each conduit joins correct, close together, unobstructed, assure significant negative pressure, general adult 10.64~15.96Kpa, the baby should be controlled in 7.98~10.64Kpa. 2 preparation rinse the asepsis physiological saline that smokes phlegmy pipe 2 bottles, 1 bottle wash pump technically with Yu Chong the suction inside tracheal spile is phlegmy canal , additional 1 bottle rinse those who had sucked mouth, nasal cavity technically to smoke phlegmy pipe . 3 equipment are very different the asepsis of model sucks phlegmy canal and asepsis glove. 4 because suck phlegmy itself,be a kind of stimulation to the patient, sober patient is not willing to suck normally phlegmy, and the family member of insensible patient also thinks to suck phlegmy special anguish.

一、吸痰前的预备工作1首先要保证负压吸引装置各管道连接正确、紧密、通畅，保证有效的负压，一般成人10.64~15.96Kpa，婴儿应控制在7.98~10.64Kpa.2预备2瓶冲洗吸痰管的无菌生理盐水，1瓶专门用于冲洗抽吸气管插管内的吸痰管，另1瓶专门冲洗吸过口、鼻腔的吸痰管。3备好不同型号的无菌吸痰管及无菌手套。4由于吸痰本身对病人是一种刺激，清醒的病人通常不愿意吸痰，而昏迷病人的家属也认为吸痰非凡痛苦。

The existence of the distal third root canal in the lower first molar, which increased by the emergence of root canal missed chances in the clinical treatment, so it is very important to double-check the number of root canals when operating root canal treatment.

下颌第一磨牙远中第三根管的出现增加了临床治疗中遗漏根管的机率，因而根管治疗时对根管数目的仔细检查非常重要。

Results indicated that faiure below surface was alveolate and pressure of inner concave of the below was increased.

结果表明，失效弯管内表面呈蜂窝状结构；由于直管与弯管的管径差异，使弯管内壁凹面压力增大而导致气泡破裂造成气蚀条件；同时在弯管凸面沉积了结瘤物。

The result shows: the material of glass reinforced plastic mortar pipe is brittle, the enlaced sample always destroyed along the interface of different layers, but the centrifugal sample destroyed along a breach; the capacity of bearing radial load of enlaced glass reinforced plastic mortar pipe is better than the centrifugal ones, the destroyed forms of them is also different. Secondly, the whole pipe and direct shear friction experiments between glass reinforced plastic mortar pipe and typical soil of Shanghai have been done.

结果表明：玻璃钢夹砂顶管管材属于脆性材料，缠绕式玻璃钢夹砂顶管的材质试样基本沿着层与层之间的分界面破坏，而离心浇铸式玻璃钢夹砂顶管材质试样的破坏是沿着某个滑裂面破坏；缠绕式玻璃钢夹砂顶管的抗径向荷载性能要优于离心浇铸式玻璃钢夹砂顶管，同时两者在径向荷载作用下的破坏形式明显不同。

Author has introduced the process design method for steam tracing system of chemical piping ;has discussed the relative regulation,code and gist in the steam tracing design at home and abroad from aspects of diameter,quantity,and max.

介绍了化工管道蒸汽伴热系统的工艺设计方法；从伴管的直径、数量、最大允许长度、U型弯累计上升高度以及伴管、疏水器、紧固件的材料等方面论述了国内外蒸汽伴管设计相关规定、规范和要点；结合工程实例，论述了伴管蒸汽的引入和伴管敷设时相关注意事项，以及在最大允许范围内出现袋形累计上升的高度值问题。

This article introduces joint type of copper-aluminum pipe,including straight pipe butted joint,flared pipe insert joint,reducing pipe insert joint and reducing pipe lap joint,and the welding technologies in domestic and abroad,including friction welding,energy storage welding,flash welding,resistance welding,braze welding,cold butt welding and ultrasonic welding.

介绍了铜铝管的接头形式，主要包括：直管对接、扩口管插接、缩口管插接和缩口管搭接；以及国内外的焊接技术，主要包括：摩擦焊、储能焊、闪光焊、电阻焊、钎焊、冷压焊及超声波钎焊等。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。