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发表于:2018-12-05 / 阅读(182) / 评论(0)

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发表于:2019-01-03 / 阅读(124) / 评论(0)

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发表于:2019-02-08 / 阅读(371) / 评论(0)

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质量合格证书 certification of fitness 原材料 raw material 底板 bottom plate 垫层 cushion 侧壁 sidewall 中心线center line 条形基础 strip footing 附件 accessories 型钢 profile steel 钢板 steel plate 熔渣 slag 飞溅 weldin

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实用英语

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