查询词典 back up

back focus：象方焦点

back flow condenser 回龄凝器 | back focus 象方焦点 | back mixing 反混, 逆向混合

back focus：镜后焦点

"后焦距","back focal length" | "镜后焦点","back focus" | "螺丝空挡","back lash"

Back gear：背齿轮

back flash 回火 | back gear 背齿轮 | back kick 回火

Back gear：背轮

back freight 回运货物运费(抵港后无法交货 | back gear 背轮 | back ground noise level 背景噪音电平

Back gear：倒挡齿轮

back gear shaft 背齿轮轴 | back gear 倒挡齿轮 | back geared motor 带减速齿轮的电动机

back gear shaft：背齿轮轴

back flap hinge 明铰链 | back gear shaft 背齿轮轴 | back gear 倒挡齿轮

back gear ratio：倒擋轉速比

"倒退齿轮,倒挡齿轮,后列齿轮","back gear" | "倒挡转速比","back gear ratio" | "后导板","back guide"

back goods freight：退货费用,退货运费

back gluer 书脊上胶机,胶背机 | back goods freight 退货费用,退货运费 | back gouging 刨焊根,背刨

back goods freight：退货运费

back goods 退货 | back goods freight 退货运费 | back letter 保函

back line：回头缆

back lighting 背面照明 | back line 回头缆 | back lobe 后瓣

Hadrian Wall：哈德 城墙 / 哈德 城墙

Hadden-Cave, Philip 夏鼎基 | Hadrian Wall 哈德 城墙 / 哈德 城墙 | Haeckel, Ernst 海克尔

skilled：熟练的

skill 技能 | skilled 熟练的 | skillet 煮锅