uncoated cast-iron pipe是什么意思，uncoated cast-iron pipe的翻译，uncoated cast-iron pipe音标、读音、用法和例句

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uncoated cast-iron pipe是什么意思，uncoated cast-iron pipe的翻译，uncoated cast-iron pipe音标、读音、用法和例句_94生活常识网有道词典