... dump extruder 挤压成形机 duration of ageing 老化期间 dynamic seal 动态密封 ...
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duration of ageing
老化持续时间
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The results indicated that the asphalt quality and its average molecular weights were increased after ageing of short duration at low temperature.
测试结果表明，低温短期老化时沥青的质量增加，平均分子量增加。
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