The effects of the plate spacing, approach velocity and the primary air temperature on evaporative cooler was predicted theoretically.

If the cutting ring and eye wear plate is not serious, cutting ring and the eye plate spacing <0.1mm, and no more than 1mm between them in a trench scratches, water law can be used directly.

The invention relates to a light information storage media, which comprising a first basal plate, an optical shade layer, a spacing layer and a recording layer.