Data show that the compositions and structures of the two asphaltenes are different.
分析结果说明，这两种沥青的沥青质在组成和结构上有明显差异。
There are two different compositions, one is used in summer and the other in cointer.
按科学配方、经加温炼制而成。分夏用冬用两种配方。
There are two different compositions, one is used in summer and the other in cointer.
按科学配方、经加温炼制而成。分夏用冬用两种配方。
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