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hard asphalt
archit.	硬沥青 (贯人度10以下)
auto.	硬质地沥青
eng.geol.	硬地沥青
oil	硬沥青; 硬质沥青
tech.	硬质沥青; 硬地沥青 (针入度10 以下)

hard asphalt : 3 phrases in 1 subject

Technology

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