The diagram shows a method of shaping glass containers. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

Several key features are revealed by the diagram illustrating a manufacturing process of forming glass containers.
Overall, the whole process consists of nine stages beginning from melting glass and ending with overlooking and classifying glass items.
As can be seen from the diagram, the first step is that glass is melted in a furnace to 105 degree Celsius. Next, the molten glass is placed into a four-sided mould in which it is pressed by a sharp-tip tool. Then the thick-walled containers formed as a result of the previous step are attached to a curved mould and expanded by natural airflow. After the containers are heated in a kiln at 482 degree Celsius, they are cooled down for an hour at 25 degree Celsius. The final phase is that the products undergo a visual examination in which high-quality ones are packaged, while low-quality ones are eliminated. At this point, the entire cycle has been completed.