英语词汇“protective coal seam”的翻译、意思、用法、释义-英汉汉英双解词典-良福网

词汇	protective coal seam
释义	protective coal seam 基本例句保护层 The glass window had a protective overcoat applied to it.玻璃窗涂有一层保护层。 All buried lines are coated with a protective covering to save them from corrosion.所有埋设的管道必须涂上保护层，以防生锈腐蚀。
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