Images grass on the picture, it’s must to be spraying on the real word. Where the system will be automatically on the pump for give air pressure in the poison tank and on the nozzle for start spraying the grass. But the system not to spraying the grass if quantity of grass on the spray area is vary small to spraying, so we describe percentage of green grass for spraying, show on figure 8.
Figure 8: Percentage of green grass for sprayer
See figure 8, if grass size bellow 0% to 20% the system not spraying the grass because it’s in small quantity of grass. So the system only automatically spraying if the quantity of grass area over then 20% on the spraying area.
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