backup[‘bAk7Qp] n. 备份
batch [bAtF] n 一批
bearing[‘bZEriN] n.轴承,支座
bed[bed] n. 床身
behavior[bi’heivjE] n. 性能
bench-work 钳工工作
bend[bend] v.弯曲
beneath[bi’ni:W] prep在···下
bin [bin] n. 仓，料架
blank [blANk] n. 坯料
blank [blANk] v. 冲裁,落料
blanking tool 落料模
blast [blQst] n.一阵（风）
blemish[‘blemiF] n. 缺点, 污点
bolster[‘bEulstE] n. 模座,垫板
boost[bu:st] n. 推进
boring[‘bC:riN] n.镗削,镗孔
bracket [‘brAkit] n. 支架
brass [brAs] n.黄铜
break down 破坏
breakage [‘breikidV] n.破坏
bridge piece
brine
[brain] n. 盐水
brittle[‘britl] adv.易碎的
buffer [bQfE] n.缓冲器
built-in 内装的
bulging [bQldViN] n. 凸肚
burr [bE:] n. 毛刺
bush [buF] n. 衬套
bush[buF]n. 衬套
by far (修饰比较级, 最高级)···得多, 最
by means of 借助于
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