Viết ít nhất 150 từ trong khoảng 20 phút.
The flowchart shows how coloured plastic paper clips are produced in a small factory.
Overall, the process starts with molten plastic and ends with packing and despatch. There are two quality control stages in the process, one for strength and one for colour.
First, molten plastic is put into three different moulds, which are red, blue and yellow, to make paper clips in three colours. After that, the paper clips go to the first quality control stage, where a machine checks them for strength. The clips which are not strong enough are rejected.
Next, the paper clips that pass the test are sorted by hand. They are divided into two groups: mixed colours and single colours. Then, there is a second quality control stage, where the colour mixture or single colours are checked. If there is a problem with the colours, the clips seem to go back to the sorting stage to be sorted again. Finally, the paper clips which pass this check are packed and sent to customers.