Students can study to model the process air cargo at any time. Content to be added into the model. Don't waste time searching for documents and to write in the paper, and can also be moved.
Students can study the model of air cargo at any time. To add content to the model. Do not waste time searching for documents and write to the paper. It also can be moved
The model can study the process of air transportation all the time. Can add content into the model. Don't waste time to find the documents and write data into the paper. And can also be removed.