Several foreign firms, including French tire company Michelin and oil servicing firm Wilbros, have left the region because of security problems.

包括法国轮胎公司米其林和石油服务公司威尔布罗斯在内的几家外国公司已经因为安全问题而离开尼日尔三角洲。

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The causes of anomalous tire wear at side slip value of front wheel keeping normal value were analysed and some problems of measuring front wheel alignment were discussed.

分析了车辆导向轮侧滑量在允许值范围仍出现轮胎异常磨耗的原因，并讨论了前轮检测中应引起重视的几个问题。

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On the basis of analysis of the functions and existing problems of the intelligent technology, key problems to be solved in the future about the intelligent tire monitoring technology are presented.

在分析智能轮胎监测技术实现功能和现存问题的基础上，提出了未来智能轮胎监测技术需要解决的关键问题。

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But the team say there is still work to be done, especially as Ferrari's Brazilian driver Felipe Massa also had a torrid race in Bahrain, finishing 15th because of tire problems.

CNN: Ferrari boss: 'We have to be perfect'

"The performance of our car and our tire management were generally good in Canada, however our competitiveness was compromised by reliability problems and mistakes, " said Brawn.

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