In other words, a purchase order containing a line item with a four-digit number in the Quantity element would be considered invalid.
换句话说，购买订单中的条目如果Quantity元素是四位数字，则认为是无效的。
Using technology of digit image processing and method of wavelet transform, in order to detect the edge of number of tire type, it is important information for tire detecting automation.
采用数字图像处理技术，应用小波变换方法，实现了轮胎图像中空心型号文字的提取，可作为轮胎分检自动化的一个重要控制信息。
A good number of people in order to not repeat a 4-digit number, can not let people know guess.
出数字的人要想好一个没有重复数字的4位数，不能让猜得人知道。
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