产品序号 meaning in Chinese

serial no

Important : the license key can only be registered once
注意事项:产品序号仅供一人注册，无法重复使用。
This protection technology is asking users relative numbers or text to decide whether the user is legal or not . this is the simplest protection method . ususally , the password table or product serial numbers will be attatched with the product , the program will require users to provide their preset password or serial numbers when running the program
是最简单的一种保护方法。通常会在产品包装内附上相关的密码表或是产品序号，当使用者执行程式时，该程式会要求使用者输入预先所提供的密码或序号，如果输入正确则程式会正常运作，反之则结束程式的执行。