The main reasons were due to the defect in the design of safety valve secondary circuit and the overlap of the service rating and the setting for safety valve popping and reseating.
主要原因是锅炉安全阀二次保护回路设计有缺陷，再加上安全阀起跳和回座的整定值与运行额定值相重叠造成的。
The numerical simulation of temperature field and shrinkage defect prediction for a valve casting, which was involved in 4 kinds of casting proces.
对采用4种不同铸造工艺方案的阀体铸件凝固过程进行了数值模拟及缺陷预测，获得了与试验相一致的模拟结果。
An automatic brake valve surface defect detection system based on the image processing technology has been developed.
开发了一种基于图像处理技术的制动阀表面缺陷自动检测系统。
Conclusion Surgical treatment offers a satisfactory effect for ventricular septal defect with aortic valve prolapses and ruptured aortic sinus aneurysm.
结论室间隔缺损合并主动脉瓣脱垂及瓦氏窦瘤破裂及早手术治疗总体效果好。
The design defect was found on the fixed sealing gasket in the guide valve of the operating mechanism.
经故障分析，并在制造厂家指导下解体检查发现该操动机构分合闸导向阀的固定密封垫存在设计上的缺陷。
Objective To explore the clinical effects of aortic valvuloplasty in treatment of ventricular septal defect(VSD)with moderate or severe aortic valve insufficiency(AI)in children.
目的探讨室间隔缺损（VSD）并中重度主动脉瓣关闭不全（AI）患儿行主动脉瓣成形术的疗效。
The results showed that the root reason for valve body failure was seriously casting defect exist and its big and density shrinkage porosity form the original crack;
结果得出：阀体失效的主要原因是阀体本身存在严重的铸造缺陷，铸造疏松严重、孔洞尺寸大乃于形成原始裂纹源；
Objective To apply submental area insular musculocutaneous skin valve to stage 1 restoration jaw caved defect.
目的应用颏下区岛状肌皮瓣一期修复颊部洞穿性缺损。
The clinical characteristics and method of treatment of 8 cases of ventricular septal defect (VSD) with aortic valve insufficiency have been reported.
报告8例室间隔缺损合并主动脉瓣关闭不全的临床特点及治疗方法。
The clinical characteristics and method of treatment of 8 cases of ventricular septal defect (VSD) with aortic valve insufficiency have been reported.
报告8例室间隔缺损合并主动脉瓣关闭不全的临床特点及治疗方法。
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