Objictive: to understand 10 pollution circumstance of the big foods in Haidian District of Beijing so as to guide people how to choose food.
前言：目的：了解北京市海淀区10大类食品的污染情况，为指导市民合理消费提供依据。
If this kind of circumstance usually took place then system to once carry big, cut over failure but creation to drop words.
这种情况若经常发生则系统负荷过大，切换失败而产生掉话。
Forging and pressing equipment work in a poor circumstance. Locating in big librations, high temperature and much dust circumstance.
锻压设备的工作环境一般都很恶劣，长期的处于振动大、温度高、灰尘多的工作环境中。
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