backpitch是什么意思 backpitch怎么读
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n. 背节距(反螺旋)
backpitch的相关资料
backman辅助工backn.后面;背脊;靠背;后背;后卫vt.支持;后退adv.向后地adj.向后的;后面的;偏远的;过时的;积欠的back-to-back credit letters背对背信用证backscattering models of waters水体后向散射模型back-lighted plotting surface反光绘图面Back engagement of cutting edge背吃刀量back - calculation for module模量反算back geared upright drill press带齿轮立式钻床back dynamometer with indicator指针型背力计backfilling approach embankment台背回填Backs up the entire database.可以备份整个数据库。backwashing intensity of filter滤池反冲洗强度
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