The effect of viscosity index improvers on viscosity of engine oils was investigated.
考察了加入粘度指数改进剂对内燃机油运动粘度的影响。
The oil companies have added viscosity index improvers or VII to oils to solve this dilemma.
机油厂家不得不添加粘度指数改进剂(VII)来解决这个问题。
The oil companies have added viscosity index improvers or VII to oils to solve this dilemma.
机油厂家不得不添加粘度指数改进剂(VII)来解决这个问题。
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