E. seal with good weather resistance, and long time not lose viscosity and mechanical strength.
密封带有良好的耐候性，且长时间不失去粘性和机械强度。
These Numbers refer to the viscosity or flow resistance within the structure of the oil.
这些数字指的是粘度或流动阻力的结构内的石油。
These Numbers refer to the viscosity or flow resistance within the structure of the oil.
这些数字指的是粘度或流动阻力的结构内的石油。
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