“asphalt roofing”的概念、定义、翻译、参考文献-科学参考

单词	asphalt roofing
释义	asphalt roofing [`a´sfȯlt `rüf·iŋ] ^MATERIALS A roofing material made by impregnating a dry roofing felt with a hot asphalt saturant, applying asphalt coatings to the weather and reverse sides, and embedding a mineral surfacing in the coating on the weather side.
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