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drilling machine with jointed arm

英 [ˈdrɪlɪŋ məˈʃiːn wɪð ˈdʒɔɪntɪd ɑːm] 美 [ˈdrɪlɪŋ məˈʃiːn wɪð ˈdʒɔɪntɪd ɑːrm]

摇臂钻床，悬臂钻床

化学

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