backsaw短锯
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 flow preventing diode逆流阻挡二极管
Backplane Interconnect VAX底板互连
back analysis of parameter参数反演
Back Pain/acupoint ther背痛/穴位疗法
backcross restoration gene回交恢复基因
Back half old needle plate后半老针板
backplastered construction背面抹灰的构造
Back-up Intercept Contro备用截击指挥系统