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当你购买一盒进口的美国万宝路香烟或一块法国生产的“爵士”香皂时,你会发现在商品的外包装上,除了商标、工厂名称外,还有一个由一排粗细不等的线条和十多
When you buy a box of imported US Marlboro cigarettes or a French-made “Jazz” soap, you will find that in addition to trademarks and factory names, there is a line of lines of different thicknesses on the outer packaging of the goods. More than ten