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back and forth method：选择法、尝试法

back action反作用 | back and forth method选择法、尝试法 | back forth motion往复运动

back and forth method：往返法

反安匝数 back ampere turns | 往返法 back and forth method | 回弧 back arc

back bond：反担保,反向键,退回证券

back bolting 顶板杆柱支护 | back bond 反担保,反向键,退回证券 | back brace 后撑

Outside Back Cover：封底

封三/Inside Back Cover 92,000 | 封底折页/Back Cover Gatefold 220,000 | 封底/Outside Back Cover 180,000

Back Cover Gatefold：封底折页

封三/Inside Back Cover 92,000 | 封底折页/Back Cover Gatefold 220,000 | 封底/Outside Back Cover 180,000

back door selling：黑市销售

"反向演译","back annotation" | "黑市销售","back door selling" | "积欠订单","back order"

back door interference：后门干扰(与电力线同方向进入天线电路之干扰噪声)

back discharge | 反向放电 | back door interference | 后门干扰(与电力线同方向进入天线电路之干扰噪声) | back door | 后门, 秘密途径

back door interference：后门干扰

back door 非法途径 | back door interference 后门干扰 | back draft 反拔模斜度,反拨模斜度,反斜度

back down off：放弃,让步,退却

back away 逐渐后退 | back down off 放弃,让步,退却 | back of 在...的后面;在...背后

back down：放弃,让步,退却

back and forth来回,往返,来来往往地 | back down放弃,让步,退却 | back off后退,让步

necking：颈缩加工

marking 刻印加工 | necking 颈缩加工 | notching 冲口加工

nachfräsen re-mill, finish-mill：精铣,二道铣

Nachformschleifen copy-grinding, profile grinding, contour grinding 仿形磨削 | nachfräsen re-mill, finish-mill 精铣,二道铣 | nachgeschaltete Doppelkupplung two-stage double clutch 串接双离合器