By improving the processing and equipments, densification efficiencies of pitches are significantly increased, some are even increased by more than 2 times.
通过改进工艺制度和工装，明显提高了沥青致密化效率，有的提高幅度为2倍以上。
By improving the processing and equipments, densification efficiencies of pitches are significantly increased, some are even increased by more than 2 times.
通过改进工艺制度和工装，明显提高了沥青致密化效率，有的提高幅度为2倍以上。
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