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【单选题】
工件夹紧的三要素是( )
A.
夹紧力的大小、夹具的稳定性、夹具的准确性
B.
工件变形小、夹具稳定可靠、定位准确
C.
夹紧力的大小、夹紧力的方向、夹紧力的作用点
D.
夹紧力要大、工件稳定、定位准确
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