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protraction [prə'trækʃ(ə)n] n
gen. 拖延; 延〔伸〕长; 延长时间小剂量照射; 按比侧制图
oil 绘制; 拖长时间
otorhinol. 前伸
tech. 制图; 突出; 延长; 伸长
protraction: 4 phrases in 3 subjects
Electronics2
Mechanics1
Technology1

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