and Automatic speeding up and down  自动升降速

Automatic Loading and Unloading  自动上下料

automatic loading and unloading device  自动装卸设备

alternating upanddownsweep  交互上下扫描

Anchor up and down  锚垂直

beat up and down  并行虚拟机; 来回奔走

bob up and down  在水面上忽沉忽浮

Bruceton up-and-down method  升降法

Digital up and down convert  数字上下变频

down and up cut  反覆切割; 同方向及逆方向交互切割

down and up operations  起下作业

down-and-up cut unit  双动剪切机

dressed full with up and down flags  垂列式满旗; 商船挂满旗

fuss up and down  忙得团团转

go up and down  升降

hand-operated going up and down mechanism  手动升降机构

hoist up and down hydraulic cylinder  起落液压缸

look somebody up and down  端详

nap-up-and-down marker  分向排版