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Blood donation camp:

The main reason of death is to lose large quantities of blood. On the other hand, many lives an be saved by donating blood in the blood donation camp. The number of bottles can be collected so that in the case of emergency, these blood bottles can be used.

Pressure cooker:

The steam  can be produced from water after reaching its boiling point. The design of the cooker is made that it controls he steam under it. The higher the temperature of water, it will help you to cook your food faster.