下压式压力机 downstroke press
下压式水压机 hydraulic down-stroke press
下压式发动机 inverted engine
下压式击球 the Knockdown Shot
下传动式压力机 bottom slide press
下压杆式 underlever cocking
下压式造型机 cope box
液压式下料机 hydraulic feeding machine
水下超压干式焊 excessive-pressure welding
自记式井下压力计 internal-recording bottom-hole pressure device
据我所知，一般有下压式和上挑式两种。
To my knowledge, there are two approaches: the pressing approach and the lifting approach.
本发明涉及一种下压式集聚纺纱装置，它属于一种环锭细纱机前区牵伸用下压式集聚纺纱设备。
The invention relates to an underslung integrated composite spinning device, belonging to an underslung integrated composite spinning device for tracting a front area of a ring spinning frame.
荔湾所有的开发井都将安装永久式的地面直读井下压力和温度计，为气藏管理和生产优化提供支持。
All development wells of liwa n will be permanently installed with surface direct-reading subsurface pressure gauge and thermometer to support gas reservoir management and production optimization.
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