凝结潜热热机
Latent heat engine of condensation
热机——热泵装置
heat engine-heat pump unit
热机钻具
bits of thermo-mechanical
短螺旋钻机钻孔成桩工艺
Drilling-into-pile techniques by the Short Spiral Drill
全液压动力头钻机
fully hydraulic driving head drill
hydraulic top-driving rig
烧结机机头烟尘
smoke and dust at head of sintering machine
双动力头钻机
double driving head drilling machine