根据待装货物体积、重量与货车容积、载重的相对关系，将货物分为两类。
In one truck-loading problem, the bulk cargo is classified as two types according to the relative relation of the volume and weight between the goods and the truck.
因为这种集装箱由一种玻璃纤维合成材料制成，所以重量只有标准集装箱的四分之三；但更重要的是，在没装货物时，这种集装箱可折叠成四分之一大小。
Because it is made of a fiberglass composite, it weighs only three-quarters as much as a standard container but-more importantly - when empty, it can be folded down to a quarter of its size.
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