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By continuous welding the helically wound fin to the tube, more efficient heat flow is achieved from the tip of the tube wall, it also eliminates gaps in the heat flow which can occur when interrupted or spot welding procedure is used .

由于连续地把螺旋翅片焊接到管子上，就使更多的有效热流从翅片顶端直达管壁，且消除当采用间断焊或点焊焊时可能存在的热阻问题。

This paper describes a method of in vitro propagation of Heliconia psittacorum cv. Rhizomatosa by using terminal shoot tip explants.

本研究目的在探讨cefotaxime抗生素预处理彩虹鸟蕉Heliconia psittacorum cv。

The mean intraocular pressure was between 0.8～2.8kPa in 17 eyes,and the Yate of control reaches to 65.4%, the postoperative complication included transicent hyphema, Early hypotony, obstruction of the tube tip and drop out of the plate.

术后并发症包括：短暂性前房出血，术后早期低眼压，引流管口阻塞及植入盘脱出。

Lactuca indica is a good pasture resource, mature period is a key for L. indica being used effectively. In this paper, the root tip of L.

苦荬莱Lactuca indica是一种优良的牧草种质资源，热期是苦荬菜利用的重要影响因素之一。

Any of various nocturnal beetle s of the family Lampyridae,characteristically having luminescent chemicals in the posterior tip of the abdomen that produce a flashing light.

萤火虫几种夜间活动的萤科昆虫中的任意一种，明显的特征是腹部的后端内有发冷光的物质，能产生闪烁的亮光

We chose 30 type milli-needle as tools after routine sterilization. Usually we pick levelly 0.5-0.8 inch at Baihui, 1. 5 inch at Jiaji, 1-1. 5 inch inclinedly to the nose tip at Fengchi, 1-1. 5 inch inclined at Jianjin, 1-1. 5 inch at Shousanli. After obtaining gas by rotating method, we used moxibustion at Baihui by lighting the moxa strip, and put the acupuncture and moxibustion therapeutic instrument (made in shanghai, G6805-Ⅰ) at other acupuncture points. We chose thin and dense wave and adjust the current strength according to endurance of the patients, and 20 minutes each time, one time every other day, 15 times a course.

操作：患者俯卧位或坐位，选30号毫针，常规消毒，管筒进针，进针后百会穴平刺0.5～0.8寸，夹脊穴直刺1.5寸，风池穴针尖微下，向鼻尖斜刺1～1.5寸，肩井斜刺1～1.5寸，手三里直刺1～1.5寸，行捻转法得气后，将艾条点燃后于百会穴上行温和灸，其余各穴接上海产G6805-Ⅰ型针灸治疗仪，用疏密波，电流强度以病人能耐受为度（其中风池穴的电流强度以偏小为宜），每次20分钟。

objective the purpose of this study was to explore the method and effectiveness of apertognathia of anterior teeth in teenagers.methods the majority patients were corrected with edgewise appliance after draw four molars, all sorts of flexure were curved on the appliance, used perpendicular traction for anterior teeth and ii, iii maxillomandibular traction, fine adjust intercuspal position ,tip and cavity.

目的 探讨青少年前牙开牙合的矫治方法和效果。方法多数患者采取拔除4个磨牙之后使用方丝弓矫治器矫治，矫治中在弓丝上弯制各种曲，并使用前牙垂直牵引和颌间ⅱ类、ⅲ类牵引，精调牙位及尖窝关系。

Anchorage loss measured at the first premolar averaged 1.3 mm,but the crowns tipped 3.5?distally.During distalization with Distal jet,the first premolar did not tend to tip mesially as found in many investigation of other intraoral distalizing appliance.

每侧第一前磨牙的支抗丧失平均为1.3mm并伴3.5 的牙冠远中倾斜，这一结果不同于其它口内磨牙远移装置所造成的前磨牙牙冠近中倾斜，与国外对同类矫治器的观察结果相似。

Upper central incisors moved forward and downward together with maxillary, at the same time they upright in the sagittal plane and tip mesially. 3 The occlusion plane rotated clockwise for about 1.5°. 4 The width increasement effect of RME comes from approximately the equal amounts of skeletal and dental expansion. The mode of dental movement was a combination of body and tipping movements of posterior teeth.

结果：1后牙在宽度方向上为整体移动和倾斜移动相结合的移动方式，但第一磨牙和第一双尖牙稍有差别；牙齿和骨对宽度增加的贡献各占约1/2；2后牙在垂直方向有伸长的趋势；3第一磨牙和第一双尖牙均向前整体移动，轴倾度保持不变；4中切牙整体随上颌骨前部向前向下移动，其牙长轴发生直立，轴倾度增加；5上颌平面发生顺时针旋转。

METHODS:The micronucleus test of Vicia faba root tip cell was used to detect the water quality,and to survey the chemical oxygen demand.The micronuclear rates and Pollution Index were determined and the F-test was used to evaluate the difference in micronuclear rates among different samples.

材料与方法：用蚕豆根尖细胞微核技术对各采样点水样进行监测，并对各水样进行化学需氧量(chemical oxygen demand，CODcr)的测定，统计分析各采样点水样的蚕豆根尖细胞微核千分率及污染指数。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。