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U-notch ['juː'nɔtʃ]
gen. U形缺口〔切口,刻槽〕
archit. U 形缺口 (刻槽)
auto. U形缺口刻槽
plast. U 形缺口〈试棒〉
polym. U 形缺口
tech. U 形槽口
U-notch: 1 phrase in 1 subject
Metallurgy1