... three-dimensional system of coordinate 三维座标系 three-jaw chuck 三爪卡盘，三爪夹盘 three-lens condenser 三透镜聚光器 ...
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短语
三爪定心夹盘
three-jaw concentric lathe chuck
;
three-jaw independent lathe chuck
三爪同心夹盘
three-jaw concentric chuck
三爪夹头及面盘
JAW SELF-CENTERING CHUCK AND PLATE
三爪杆动夹盘
three-jaw lever-operated chuck