The reverse side of the mirror should be in continuous contact with air without needing ventilation.
反射镜的背面应经常与空气接触但无需通风。
2
The reverse side of the mirror should be in continuous contact with air without needing ventilation .
反射镜的背面应经常与空气接触但无需通风。
3
Test research of discarding coarse tailings in new technological flowsheet consisting of two stage continuous grinding-gravity separation-magnetic separation-reverse flotation is described.