On the package of the product, there must be noted explicitly the actual weights (net and gross);
产品包装上必须注明实际重量（净重和毛重）；
If the net weights of the two items are the same, compare the prices to determine the cheapest.
如果两件商品的净重是一样的，通过比较价格来确定最便宜的。
The model is used to analyze the influences on the net of gravity sea cage by the different sinker weights in uniform flow.
利用此模型分析了重力式网箱在均匀流作用下，不同的配重重量对其受力和变形的影响。
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