According to the worn characteristics of common wear-resistant material under normal condition, microstructure and metallurgical structure of this kind of materials have been summarized in detail.
针对常用耐磨材料在磨损工况中的损伤特点，总结用于这类工况材料应具备的微观组织及各组成相的性能特点。
Under normal condition, the fibrinogen half-life is 3 to 4 days.
正常情况下，纤维蛋白原半衰期为3 ~ 4天。
The other parts of the system where maintenance is required are the diaphragm valves. Under normal condition, the valve's diaphragm should be replaced every two years.
系统的其它部分的维护如隔膜阀的维护也是必须的。在正常条件下，阀的隔膜每两年需要更换一次。
The other parts of the system where maintenance is required are the diaphragm valves. Under normal condition, the valve's diaphragm should be replaced every two years.
系统的其它部分的维护如隔膜阀的维护也是必须的。在正常条件下，阀的隔膜每两年需要更换一次。
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