De gb fr nl es it dk se fi pl gr ru分别代表哪些国家语言de 德文 gb 英文fr 法文nl 荷兰文es 西班牙文it 意大利文dk 丹麦文se 瑞典文fi 芬兰文pl 波兰文gr 希腊文ru 俄文各国语言简写：en 英文. 管道标注dn、de、、φ、d、d区别： dn是指管道的 公称直径，注意：这既不是外径也不是内径，是外径与内径的 平均值，称平均内径。如：dn200~φ219×6 d一般指管道内径。 d 混凝土.
Especial Getúlio Vargas Agosto de 1954 60 anos de uma tragédia
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