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台式砂轮机: 磨削, 建设[1](28s);[2](58s)下载 收藏其他(other) / 磨床(grinder) / 电动(electric)
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平面磨床: 排队的工作, 研磨面, 建设下载 收藏其他(other) / 磨床(grinder) / 电动(electric)
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hand held grinder: [1](5s):on and off, construction;[2](37s):grinding metal plate, construction下载 收藏其他(other) / 磨床(grinder) / 电动(electric)
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disc grinder: grinding [1](52s):thin metal, construction;[2](38s):metal rod, construction下载 收藏其他(other) / 磨床(grinder) / 电动(electric)