Why Youths Drop out of High School: The Impact of Preferences
Why Youths Drop out of High School: The Impact of Preferences
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为什么年轻人高中辍学：偏好的影响
DOI：
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
K. Wolpin
中科院分区：
文献类型：
--
作者：
Z. Eckstein;K. Wolpin
公开了一种注油器组件，用于供给相对精确和一致的润滑。该组件包括润滑剂的供应源和使该供应源与润滑点连通的流动管线。计量阀插入在流动管线中，并且通常包括具有入口和出口的主体。主体还包括孔，该孔的一端与入口连通，另一端与出口连通。多孔杆设置在主体的孔中。密封件设置在孔中，以阻止润滑剂从孔的入口端到出口端的通道，除了通过所述多孔杆的通道。
An oiler assembly is disclosed for feeding a relatively precise and consistent lubrication. The assembly includes a supply of the lubricant and a flow line placing the supply in communication with the lubrication point. A metering valve is interposed in the flow line and generally comprises a body having an inlet and an outlet. The body further includes a bore having one end thereof in communication with the inlet and the other end thereof in communication with the outlet. A porous rod is disposed in the bore of the body. A sealing member is disposed in the bore to preclude the passage of lubricant from the inlet end to the outlet end of the bore except by passage through said porous rod.
工作强度对青少年心理健康、成就和行为调整的影响：来自前瞻性研究的新证据。
影响因子：
4.6
作者：
Mortimer,JT;Finch,MD;Ryu,S;Shanahan,MJ;Call,KT
通讯作者：
Call,KT