backingup

英 ['bækɪŋɡʌp] 美 ['bækɪŋɡʌp]

释义
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- n. 封底焊
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临近单词

backmen back back-and-foot technique back sliding step technique back filling behind abutment Back - propagation network back-connected stone panel BACK POCKET HEIGHT AT CENTER back-leaning angle of body backcross quantitative trait Back and Forth in Bangladesh backscattered electron image

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