Results 51 to 60 of about 995 (103)

高压支柱瓷绝缘子断裂分析

Gaoya dianqi, 2015
高压支柱瓷绝缘子断裂事故频有发生,严重威胁电网的安全运行。文中结合某站绝缘子断裂事故,对其进行了宏观检查及微观组织检测,分析结果表明:该类型绝缘子存在缺砂及胶装气孔严重缺陷,同时微观组织中存在气孔率偏高、玻璃相裂纹、Ti O2杂质相等缺陷,在微观上会形成裂纹源,导致了绝缘子强度的降低,并对其提出了相应的监督措施,对设计、制造、运行有一定的借鉴意义。
陈琳依, 帅勇, 胡加瑞, 刘纯, 欧阳克俭, 谢亿   +5 more
doaj  

[Effect of various intracanal materials on the diagnostic accuracy of cone-beam computed tomography in vertical root fractures]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban, 2023
Zhang JH, Pan J, Sun ZP, Wang X.
europepmc   +1 more source

[Effect of porous surface structure on fatigue strength of 3D printed zirconia]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Zhao J, Ding Q, Li W, Ma Q, Lan Y, Zhang L, Han J.   +6 more
europepmc   +1 more source

[Resin short post retention for reattachment of a fractured crown in a young permanent tooth with complicated crown-root fracture and root fracture: a case report]. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi
Wang Y, Chang H, Zhang B, Liao Z.
europepmc   +1 more source

[Long-term prognosis and influencing factors of anterior composite resin restoration]. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi
Chen W, Wu F, Wei X.
europepmc   +1 more source

[Meige syndrome with dyspnea as main manifestation: a report of one case and literature review]. [PDF]

Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi
Liu T, Xu J, Ye J.
europepmc   +1 more source

[Application value of hinge position design of Ilizarov circular external fixator for correcting clubfoot deformity in preventing ankle dislocation]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Zhang D, Yang S, Shi B, Li S, Zhen L, Wang Y, Zhang Y, Qin S, Pan Q.   +8 more
europepmc   +1 more source

[Summary of clinical experience of 9 children with anterior cervical enterogenic cysts]. [PDF]

Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi
Zhao H, Zhao S, Zhai Y, Guo R, Xu H, Huang S, Lyu L, Zhang S.   +7 more
europepmc   +1 more source

[Clinical study of percutaneous short-segment injured vertebra pedicle screw fixation combined with bone grafting in treatment of thoracolumbar fractures]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Jia L, Li X, Qian Y, Chen M.
europepmc   +1 more source

Formation of dentinal microcracks after root canal preparation with four kinds of mechanical nickel-titanium files. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi
Wang Z, Xue M.
europepmc   +1 more source