Results 141 to 150 of about 3,884 (205)
[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 ZhiZhang D +8 more
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[Summary of clinical experience of 9 children with anterior cervical enterogenic cysts]. [PDF]
Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za ZhiZhao H +7 more
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Zhongshan Daxue xuebao. Yixue kexue ban, 1990 本文用牙体光弹性实验研究证实了牙颈部应力集中的客观存在,作者认为:牙颈部长期的应力集中,可能出现疲劳裂纹,如若伴随化学腐蚀的作用(如酸类),则可能加速疲劳裂纹的形成与发展,最终形成楔状缺损。
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[Advances in application of tissue expansion technology in breast reconstruction]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiJiang Y, Tang Z, Xiao S.
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Dianci bileiqi在机械、热、电和环境等多种因素的长期作用下，支柱瓷绝缘子的电瓷性能发生显著劣化，同时在表面以及内部容易产生微裂纹，最终导致支柱瓷绝缘子发生断裂，影响变电站的安全运行。本文研究两支运行年限超15年劣化断裂的硅质和铝质支柱瓷绝缘子，通过机械性能、化学成分、晶相、显微结构分析了两种劣化支柱瓷绝缘子的瓷件理化特性和微观形貌，并对未涂覆沥青缓冲层的支柱瓷绝缘子承受应力情况开展了热应力仿真模拟。断裂硅质瓷支柱绝缘子的微观结构呈现疏松多孔特征，大量石英颗粒与基体形成环状微裂纹 ...
徐碧川 +5 more
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