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。
Adopting aero using high material, the revolving oil filter is superior to usual filter core by 20%, it can prolong the servicing life of the main body.
采用航空用高端材料过滤的旋装式油过滤器，效果比常规的滤芯高20%，有效延长主机正常使用寿命。
Thus development of improved additives like anti-oxidants and viscosity index improves for engine oil has enabled routine servicing intervals to increase from 3000 to 6000 to 12000 miles.
一些添加剂如抗氧化剂的开发和发动机油粘度指数改进使汽车日产维修期限从3000英里延长到6000英里再到12000英里。
Thus development of improved additives like anti-oxidants and viscosity index improves for engine oil has enabled routine servicing intervals to increase from 3000 to 6000 to 12000 miles.
一些添加剂如抗氧化剂的开发和发动机油粘度指数改进使汽车日产维修期限从3000英里延长到6000英里再到12000英里。
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