压: press; push down; hold down; ...头: 5点就得动身 have to start before ...损失: lose指示表: dial gauge压头损失: draught loss; head loss; headloss; loss in head; loss of head; loss of pressure head; loss-of-head压头损失计: loss of head gauge压头损失仪: loss-of-head gage总压头损失: loss of total head局部压头损失: local losses of head液体压头损失: fluid head loss压头损失;压力损失: head loss管出口段压头损失: loss of head due to exit扩张管压头损失: loss-of-head due to enlargement收缩管压头损失: loss-of-head due to contraction通用压头损失系数: universal head loss coefficient管道配件的压头损失: loss of head due to pipe fitting管进口段的压头损失: loss of head due to entrance通风机空气压头损失: fan slip; ventilator air head loss损失指数: loss index指示表: deal gage; dial gauge; index gauge; indicating gauge; indicator gage; instruction sheet介质损失指数: dielectric loss index停止损失指令: stop loss order信号消失指示: signal failure indication接头损失: splice loss切头损失: scrap down