samdwich

The valve work condition and normal failure are studied in this paper. The heat treatment of 21-4N steel exhaust valve is related to the samdwich separated out. The samdwich affects the valve capability 21-4N steel exhaust valve fatigue fracture is caused by thermal overstress.

本文介绍了气门的工作条件、正常失效及21-4N钢排气门强化热处理与层状析出的关系，分析了层状组织对其性能影响和21-4N钢排气门过载断头失效的原因。

There are mutual samdwich rock of Cambrian limestone and shale in Pan-shi reservoir's to piloting water tunnel and flooding water tunnel, In which the shale is decisive to the tunnel stability.

盘石水库泄洪洞、导流洞所涉及的岩体为寒武系下统灰、页岩互层层状岩体。其中页岩对洞室的稳定起决定作用。

The project's resource management should be samdwich more objective and dynamic. It made resource collocate and assembled better, organize, control and assort with the resource designedly, and quest balance in dynamic.

项目资源管理应该是多层次、多目标、动态的管理，它优化各种资源配置与组合，有计划地组织、协调、控制各种资源，在动态中寻求平衡。