The general formula about the calculation of downslide force and resistance to sliding in the arbitrary unit of landslide is deduced in the digital landform image.
Carbarn door is a small vertical sliding door used to civil building, and it can be equipped remote function on electrical control, and installed electronic auto-brain lock.
The water drops upon the light green leaves, sliding across the nervure, rolling to the edge of the leaves and down to the land, streching its transparent and full of change body.