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1997年11月7日中午12点15分，某公司传动轴厂职工杜某，男，40岁，食用从本厂职工食堂单身服务窗口购得的饭菜后，出现四肢无力、头昏、头痛、恶心、呕吐等症状，并可见日唇紫绀，指甲末端发紫，脸色灰白。随后，类似“病例”陆续出现，截止11月7日下午3点10分，累计共有118人?
At 12:15 on November 7, 1997, Dumou, a 40-year-old employee of a transmission shaft factory in a company, suffered from weakness, dizziness, headache and fatigue after eating meals purchased from the single service window of the factory staff canteen. Nausea, vomiting and other symptoms, and visible lips cyanosis, nail ends purple, his face gray. Subsequently, a similar “case” one after another appear, as of 3:10 pm on November 7, a total of 118 people?