alkaline earth family是什么意思

用法例句

China is rich in rare earth and alkaline earth elements.

结合我国富有资源稀土和碱土,介绍了稀土和碱土在镁合金中的作用和影响,概括了它们在Mg-Al系耐热镁合金中的应用现状,以及在研制汽车用耐热镁合金中所发挥的重要作用。

The characteristics of deoxidization of alkaline-earth metals-contained compound alloys has been introduced in this paper, conclusion can be drawn that it will be promising developing alkaline-earth metals-contained alloys which can be applied in purified steel manufacture.

介绍了碱土复合合金的脱氧特性,指出开发适用于纯净钢的碱土金属复合合金有重要的应用价值。

The practice shows that the control and refinment are selected to produce pure alkaline-earth metalscompound alloys.

指出杂质的控制与精炼是生产纯净碱土复合铁合金的必然选择。

By the field experiment,the changes of eigenvalues such as salt-composition、pH、alkalinity、permeability and hardness of soil in the process of improving alkaline soil with desulfurized gypsum were investigated.

本文通过田间试验,研究了脱硫石膏在改良碱土过程中对碱土特征值(盐分组成、pH值、碱化度、土壤渗透性及硬度)的影响。

The results indicated that the soil total salt at the research area was generally less than the saline target (<5 g/kg),the total alkalioity was bigger than alkali soil target(>2.

结果表明:研究区梭梭林立地土壤具有总盐含量普遍小于盐化指标(<5 g/kg)、总碱度大于碱土指标(>2。