n.向上的迸发，上冲，猛增
Key to structure design of UPC frame.
UPC框架结构设计的注意事项.
What are UPC codes? what are they and how do I get one?
什么是UPC代码——它们是什么? 我如何能得到?
A four - bar - width bar code said to be the European counterpart of UPC.
一种四条宽的条形码,是通用产品代码(UPC)在欧洲的变型.
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