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载重斜交轮胎折断线原因分析及改进措施
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作者 何红卫 李豪 刘文民 《橡胶科技》 2003年第20期4-7,共4页
针对目前载重斜交轮胎出现的折断线问题,通过对9.00-20-16PR、10.00-20-16PR各两种品牌轮胎模拟超载、低气压的使用条件和9.00-20-18PR轮胎耐久前后物理机械性能的对比,分析造成这一问题的主要原因:即超载低气压高速长距离行驶。从轮胎... 针对目前载重斜交轮胎出现的折断线问题,通过对9.00-20-16PR、10.00-20-16PR各两种品牌轮胎模拟超载、低气压的使用条件和9.00-20-18PR轮胎耐久前后物理机械性能的对比,分析造成这一问题的主要原因:即超载低气压高速长距离行驶。从轮胎结构设计、施工设计、配方设计、生产设备等方面提出了几点改进措施。 展开更多
关键词 载重斜交轮胎 折断线 超载 气压 结构设计 施工设计 配方设计
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用VBA在Auto CAD2000中实现绘制内含折断线的构件
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作者 朱军功 《基建优化》 2002年第5期52-54,共3页
介绍了如何运用VBA开发在AutoCAD 2 0 0 0中绘制内含折断线的应用程序 ,并实现对其自动加载 ,该程序通过人机交互 ,人机对话更为方便快捷 ,在工程CAD绘图中能极大提高设计效率。
关键词 AUTOCAD VBA 折断线 加载 工程设计
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用VBA在AutoCAD 2000中绘制折断线的构件
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作者 朱军功 《江苏交通科技》 2002年第2期36-38,29,共4页
本文介绍了如何运用VBA开发在AutoCAD2000中绘制内含折断线的应用程序,并实现对其自动加载,供路桥设计人员参考。
关键词 AUTOCAD 2000 绘制 折断线 构件 VBA 制图
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防折断咬线器联合输血器在保护心电导联线中的应用
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作者 赵川林 《中国乡村医药》 2022年第18期40-40,共1页
心电监护仪是医院常用的精密医学仪器,用于监测患者的心率、血压、血氧饱和度等的动态变化,为医护人员提供客观的数据,有利于医护人员及早发现患者病情变化,及时救治,保障患者安全[1]。但在临床使用过程中,高频率的使用,以及患者体液、... 心电监护仪是医院常用的精密医学仪器,用于监测患者的心率、血压、血氧饱和度等的动态变化,为医护人员提供客观的数据,有利于医护人员及早发现患者病情变化,及时救治,保障患者安全[1]。但在临床使用过程中,高频率的使用,以及患者体液、分泌物及消毒液的刺激,容易导致导联线塑料外壳裂开甚至撕裂,使导联线内的金属丝外露,缩短了导联线的使用寿命。 展开更多
关键词 折断线 输血器 心电导联线
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风电场集电线路引流线故障分析与对策 被引量:4
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作者 邢李方 张建新 +1 位作者 王阳 刘朋林 《通信电源技术》 2018年第12期196-197,共2页
风力发电场35 kV集电线路是风电场电气设备的重要组成部分,而集电线路的稳定运行关系到风电场电气设备的供电可靠性,关系到升压站电气设备和风电机组电气设备的安全和稳定。风电场35 kV集电线路的运行环境恶劣且复杂,易受气候环境影响... 风力发电场35 kV集电线路是风电场电气设备的重要组成部分,而集电线路的稳定运行关系到风电场电气设备的供电可靠性,关系到升压站电气设备和风电机组电气设备的安全和稳定。风电场35 kV集电线路的运行环境恶劣且复杂,易受气候环境影响而引发各种故障。随着新能源电力的发展,风电场的建设规模越来越大。为了使风电场正常运行,必须做好35 kV集电线路的检修和维护工作,消除设备隐患。因此,针对风电场35 kV绝缘型引流线在大风期间发生折断的问题,以及其造成的风电场整条发电线路停运、升压站电压波动、风电机组变频器模块爆裂等问题进行分析,并提出了技术改造措施。 展开更多
关键词 35kV集电线 引流线折断 技术改造
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后牙折裂治疗后铸造全冠修复临床观察 被引量:2
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作者 李玉涛 《中国冶金工业医学杂志》 2007年第z1期88-89,共2页
关键词 全冠修复 折裂牙 冠折裂 临时冠 结扎丝 治疗后 高速牙钻 铸造全冠 折断线
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根管正畸联合治疗前牙外伤根折
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作者 栾桂琴 李慕 《黑龙江医药》 CAS 1991年第5期43-44,共2页
在临床工作中,我们时常遇到前牙外伤根折的病例,以往一直认为,根尖三分之一处根折愈合好,根中三分之一处根折难以确定;冠侧三分之一的根折则没有希望。因冠侧三分之一的根折,折断线在牙龈及牙槽嵴下,患牙常因无法进行桩冠修复而被拔除... 在临床工作中,我们时常遇到前牙外伤根折的病例,以往一直认为,根尖三分之一处根折愈合好,根中三分之一处根折难以确定;冠侧三分之一的根折则没有希望。因冠侧三分之一的根折,折断线在牙龈及牙槽嵴下,患牙常因无法进行桩冠修复而被拔除。不但影响患者的美观,也影响患者的咀嚼功能。北京医科大学口腔医学院根据国外报道。 展开更多
关键词 根折 根管 牙外伤 折断线 桩冠修复 矫治力 牙槽嵴 固定矫治 牵引钩 牙唇面
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内层生产改善之路
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作者 曹友新 《印制电路资讯》 2004年第4期56-66,共11页
本文从生产实践出发,结合实际经验,从PCB内层生产遇到的问题,找到这些问题的方法和技巧,及如何控制问题的产生入手,讨论了如何整体提高PCB内层生产的质量水平。此文并不涉及许多当今PCB行业出现的新技术、新方法,而仅是针对大多数... 本文从生产实践出发,结合实际经验,从PCB内层生产遇到的问题,找到这些问题的方法和技巧,及如何控制问题的产生入手,讨论了如何整体提高PCB内层生产的质量水平。此文并不涉及许多当今PCB行业出现的新技术、新方法,而仅是针对大多数PCB生产厂家正在使用普通技术和流程,让大家了解普通生产时,内层将面临的总是和解决方法,以供内层同行参考。 展开更多
关键词 PCB 内层生产 图像转移 短路 开路 折断线
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RADIOGRAPHIC MEASUREMENTS OF THEHEIGHTS OF VERTEBRAL BODIES INTHORACICANDLUMBARSPINE 被引量:2
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作者 戴力扬 《Chinese Medical Sciences Journal》 CAS CSCD 1996年第2期117-119,共3页
Radiographic measurements was performed on 124 normal adults for anterior, posterior and middle heights of the vertebral bodies in thoracic and lumbar spine. The normal ratios of vertebral height in one vertebral body... Radiographic measurements was performed on 124 normal adults for anterior, posterior and middle heights of the vertebral bodies in thoracic and lumbar spine. The normal ratios of vertebral height in one vertebral body and one with the adjacent bodies were presented. The method for measurement and its diagnostic value to osteoporotic vertebral fractures were discussed. 展开更多
关键词 OSTEOPOROSIS spinal fractures
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防止爆胎的技术措施
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作者 李明诚 《江苏农机化》 1997年第2期36-37,共2页
1.选购优质轮胎。要认准名牌优质产品,看清轮胎的生产批号,不要购买库存期已久或出现老化变质的轮胎,以确保轮胎质量,这是防止爆胎的物质基础。 2.保持正常气压。“气压是轮胎的生命”,如果气压不足,容易造成胎体穹曲,帘线折断;如果气... 1.选购优质轮胎。要认准名牌优质产品,看清轮胎的生产批号,不要购买库存期已久或出现老化变质的轮胎,以确保轮胎质量,这是防止爆胎的物质基础。 2.保持正常气压。“气压是轮胎的生命”,如果气压不足,容易造成胎体穹曲,帘线折断;如果气压过高,胎体的弹性降低,若遇到冲击力,容易从小损伤处发生内裂。各种车型的轮胎应经常维持使用说明书规定的标准工作气压,误差不应大于±0.2千克力/厘米~2。 3.杜绝超载超速。若车辆经常超速超载,将造成轮胎过分变形和发热,促使橡胎老化。据试验。 展开更多
关键词 技术措施 轮胎使用寿命 名牌优质产品 爆胎 线折断 轮胎花纹磨平 常气压 工作气压 超载超速 使用说明书
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动物的再生术
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作者 金河 《初中生必读》 2023年第9期48-49,共2页
壁虎断尾求生的故事大家都了解,与壁虎类似的一些低等动物,同样也拥有令人惊羡的再生能力,我们一起了解一下吧。螃蟹断脚再生螃蟹的钳脚上都有天生的“折断线”。如果某一钳脚被敌人咬住,或在搏斗中受伤,它就会收缩一种特别的肌肉,忍痛... 壁虎断尾求生的故事大家都了解,与壁虎类似的一些低等动物,同样也拥有令人惊羡的再生能力,我们一起了解一下吧。螃蟹断脚再生螃蟹的钳脚上都有天生的“折断线”。如果某一钳脚被敌人咬住,或在搏斗中受伤,它就会收缩一种特别的肌肉,忍痛断掉这一肢。断肢并不会流血,因为肢体内有特别的膜将神经与血管完全封闭,血红细胞会立即产生蛋白质使伤口痊愈。到了下一次蜕壳时,断肢的地方会长出新的钳脚。科学家通过长期观察发现,螃蟹的这种断肢再生,能够重复多次。 展开更多
关键词 血红细胞 折断线 壁虎 螃蟹 再生能力 断肢
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Comparison of ultrasonography and radiography in diagnosis of rib fractures 被引量:7
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作者 Elham Pishbin Koorosh Ahmadi +3 位作者 Molood Foogardi Maryam Salehi Farrokh Seilanian Toosi Vafa Rahimi-Movaghar 《Chinese Journal of Traumatology》 CAS CSCD 2017年第4期226-228,共3页
Purpose: Rib fractures are the most common skeletal thoracic injuries resulting from blunt chest trauma. Half of the rib fractures are not detected upon a precise physical evaluation and radiographs. Recently ultraso... Purpose: Rib fractures are the most common skeletal thoracic injuries resulting from blunt chest trauma. Half of the rib fractures are not detected upon a precise physical evaluation and radiographs. Recently ultrasonography (USG) has been investigated to detect rib fractures. But based on literature the usefulness of USG varies widely. This study was conducted to investigate the role of USG in the detection of possible rib fractures in comparison with radiography. Methods: In this cross-sectional study, consecutive patients with minor blunt chest trauma and suspected rib fractures presenting in Imam Reza Hospital located in Mashhad-Iran, between April 2013 and October 2013 were assessed by USG and radiography. The radiography was performed in a posteroanterior (PA) chest projection and oblique rib view centered over the area of trauma. The time duration spent in taking USG and radiography were recorded. The prevalence and location of fractures revealed by USG and radiography were compared. Results: Sixty-one suspected patients were assessed. The male to female ratio was 2.4:1 (43 men and 18 women) with a mean ± SD age of (44.3 ± 19.7) years. There were totally 59 rib fractures in 38 (62.3%) patients based on radiography and USG, while 23 (37.7%) patients had no diagnostic evidence of rib lesions. USG revealed 58 rib fractures in 33 (54.1%) of 61 suspected patients and radiographs revealed 32 rib fractures in 20 (32.8%) of 61 patients. A total of 58 (98.3%) rib fractures were detected by USG, whereas oblique rib view and PA chest radiography showed 27 (45.8%) and 24 (40.7%) rib fractures, respectively. The average duration of USG was (12 ± 3) min (range 7e17 min), whereas the duration of radiography was (27 ± 6) min (range 15-37 min). The kappa coefficient showed a low level of agreement between both USG and PA chest radiography (kappa coefficient=0.28), and between USG and oblique rib view (kappa coefficient=0.32). Conclusion: USG discloses more fractures than radiography in most patients presenting with suspected rib fractures. Moreover USG requires significantly less time than radiography. 展开更多
关键词 Rib fractures RADIOGRAPHY ULTRASONOGRAPHY
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Identification and classification in le fort type fractures by using 2D and 3D computed tomography 被引量:1
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作者 陈伟建 杨运俊 +3 位作者 方一鸣 许方洪 张林 曹国全 《Chinese Journal of Traumatology》 CAS 2006年第1期59-64,共6页
Objective: To evaluate the usefulness of two- dimensional (2D) and three-dimensional (3D) computed tomography (CT) in the identification and classification of Le Fort type fractures. Methods: Sixty-two patients with d... Objective: To evaluate the usefulness of two- dimensional (2D) and three-dimensional (3D) computed tomography (CT) in the identification and classification of Le Fort type fractures. Methods: Sixty-two patients with different types of Le Fort fractures underwent CT scanning and 3D-CT reconstruction. The data were analyzed by multiplanar reconstruction (MPR), surface shaded display (SSD) and volume rendering (VR) respectively. Results: The patients with Le Fort Ⅰ, Le Fort Ⅱ fracture and Le Fort Ⅲ fracture accounted for 16.1%, 14.5% and 12.9% respectively. The compound fractures were the most common type and accounted for 56.5% (n=35, 18 cases with Le FortⅠ+Ⅱ fracture, 10 cases with Le Fort Ⅱ+Ⅲ fracture and 7 cases with Le FortⅠ+ Ⅱ+Ⅲ fracture). Fifty-five cases coexisted with other fractures in maxillofacial region. 2D-CT could be used to define the tiny fractures and the deep-structure fractures more accurately compared with 3D-CT, but the real impression of Le Fort type fractures could not be correctly evaluated on 2D-CT. 3D-CT could clearly demonstrate the whole shape of Le Fort type fractures and identify the classification of Le Fort fractures. Conclusions: 3D-CT is the best imaging method for the diagnosis of Le Fort type fractures and can provide valuable information of space relationship, especially for the design of treatment plan before operation. 展开更多
关键词 FRACTURES Tomography X-raycomputed Imaging Three-Dimensional
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Intramedullary devices in the management of Judet III and IV paediatric radial neck fractures 被引量:5
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作者 Manish Kiran Colin Bruce +2 位作者 Harvey George Neeraj Garg Roger Walton 《Chinese Journal of Traumatology》 CAS CSCD 2018年第1期34-37,共4页
Purpose: The aim of this study is to discuss the results of different intramedullary devices used in the management of paediatric radial neck fractures and to suggest methods to avoid the pitfalls of the technique. M... Purpose: The aim of this study is to discuss the results of different intramedullary devices used in the management of paediatric radial neck fractures and to suggest methods to avoid the pitfalls of the technique. Methods: Thirty patients with isolated Judet III and IV fractures were included in this prospective study. Judet I and II fractures and radial neck fractures associated with other injuries were excluded. The final results were graded using the Metaizeau functional scoring system and Oxford Elbow Score. Results: The functional result was good to excellent in 24 of 30 cases (80%). The mean Oxford Elbow Score was 44.32. The mean follow-up was 40.11 months. The complications seen were radiocapitellar joint penetration - 6 cases at mean 4.87 weeks, redisplacement - 6, radial epiphyseal sclerosis - 5, and heterotopic ossification 1 case. Conclusion: lntramedullary K wires may result in radiocapitellar joint penetration. Titanium Elastic Nail System should not be used as purely fixation devices as they may not prevent redisplacement. Regular follow-up until at least 6 weeks is essential. Patients who have a Judet IV fracture and need open reduction should be given a guarded prognosis. The paper highlights the pitfalls of the technique and makes recommendations regarding the type of implant, follow-up and patient counselling in Judet IV fractures. 展开更多
关键词 Paediatric radial neck fractures Judet Metaizeau Titanium Elastic Nail System Level of evidence IV
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