It is a protecting landscape that fascinates, as the action of the mineral waters that contains calciumoxides left fantastic marks in the structures.
这是一个受到保护的令人神往的自然景观,由于含氧化钙的矿物水的作用,留下了神奇的结构性的痕迹。
2
A process is disclosed in which coarse silica, calciumoxides and magnesium oxides are treated in a ball mill together with grinding AIDS and cold-strength binders.
公开了一种方法,其中在球磨中与磨料和冷粘着粘结剂一起处理粗二氧化硅、氧化钙和氧化镁源。
3
The possibility of reduction of rare-earth oxides to metals by aluminum in Fe-Cr-Al alloys as well as by aluminum, calcium, silicon and titanium has been studied from the view point of thermodynamics.