Need to evaluate the needs of the goods to choose the container type, the container size most suitable. From there, save on investment costs. As a dry container 40 feet containing the amount of goods equivalent to 02 dry containers 20 feet but the price of a dry container 40 feet only by 2/3 than the price of 02 dry containers 20 feet, so if the ground is wide enough for dry containers 40 feet then the investment of dry containers 40 feet has a higher economic efficiency than buying 02 dry containers 20 feet.
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