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Very high viscosity index and excellent viscosity stability in operation.
突出的高粘度指数，使用中卓越的粘度稳定性。
youdao
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Security stability is very important in power system operation.
安全稳定问题是电力系统运行的重要问题。
youdao
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Security stability is very important in power system operation.
安全稳定问题是电力系统运行的重要问题。
youdao