These asphalts are used in the construction of built-up roof coverings, the coating of underground transmission pipes and other applications.
这些沥青可用于组合屋面复盖层的建造、地下输送管线的涂层及其他应用领域。
These asphalts are used in the construction of built-up roof coverings, the coating of underground transmission pipes and other applications.
这些沥青可用于组合屋面复盖层的建造、地下输送管线的涂层及其他应用领域。
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