较宽的温度范围在低温下仍能保持流动。
Wide temperature range at low temperatures can still keep flowing.
化学稳定性好在较宽的温度范围下机械强度好，刚性高。
The chemical stability in a wide range of temperature, high mechanical strength good rigidity.
当希望在某一较宽的温度范围内使用时，输送介质的粘度指数应该高些。
When hope in a wide temperature range of use, transmission medium viscosity index should be higher.
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