permissib相关论文
阐述了一种同时按行程速度变化系数K和许用传动角[γ]设计曲柄摇杆机构的解析法.该方法简单、明了,能根据机构的传动质量要求预先确......
水功能区纳污能力是河流水环境污染防治以及提高环境管理水平的重要内容,能够实现对流域理性认识的提升,并为环境污染治理办法提供......
The Impact of Some Uncontrolled Landfill Sites on the Ecosystems of Surrounding Areas of Eastern and
The most visible uncontrolled landfill sites were selected in the western and eastern parts of the territory of Georgia.......