Water is very important. It is the source of life. Everything in the world can’t live without water. The proportion of water and a person’s weight is about 70%. People can live without eating food for three days, but they will be very close to death if they don’t drink water for three days. The same goes for other creature. What’s worse, without water, everything will be stop. We can’t have power, and the world will be in the darkness. The parts of cell phone can’t be made. Then we have no way to connect with others. In a word, water is pretty significant. We need to protect it and save it.
First of all, letters and packets are collected in bags from pillar boxes, post offices and firms, in post office vans. They are then taken to the sorting office, where the bags are emptied and the letters separated from the packets. Following this step, the letters are put through machines so that the stamps can be cancelled. In this process the date and place of sorting are put over the stamps on each envelop. In the next stage, the sorting of the letters takes place, according to the country they are addressed to.
This is done by placing them in the appropriate pigeon hole. Sebsequently, the letters are taken from the pigeon hole and placed in baskets,which are then put onto a conveyor belt. While on this conveyor belt, the baskets are directed to the appropriate secondary sorting section by means of coding pegs. At the secondary sorting frames, the letters are put into towns in the country Later, the letters are tied in bundles and a label is put on showing the towns they are addressed to.