The dall flow tube is an empirical design with an extremely high pressure head recovery . Dall流量管是具有特别高的压头补偿的实验装置。
The method involves measurement of the volume of liquid, under constant head conditions . 这个方法,液体在恒定的压头下,测定液体的体积。
When the downstream head is greater than about 3/5 of the upstream head, flow is submerged . 当下游压头大于上游压头约35时,流量是潜流。
It is frequently referred to as "pressure head" when expressed in terms of energy per unit weight of water . 当以单位水重的能量来表达时,经常看作为“压头”。
Also, the difference in pressure between any two points in a bed is roughly approximated by the static head of bed between these points . 还有,床层中任意两点间的压差大致等于这两点间床层静压头。
压: press; push down; hold down; ...头: 5点就得动身 have to start before ...泵压头: delivery head; head of pump; head on pump; pumbead; pump head; pumping head比压头: specific head测压头: pressure cell低压头: low head; low-head动压头: dynamic head; kinetic head; kinetic height负压头: negative head高压头: high pressure head; high-head滚压头: milled head; rolling head挤压头: extrusion head静压头: elevation head; gravity head; head pressure; hydraulic head; hydrostatic head; potential head; static draft; static lift; static pre ure head; static pressure head; static-elevation difference; statical head净压头: net head; net pressure head全压头: total differential head; total head pressure; total pressure head; total-head pressure (tdh)热压头: hot cropping; hot press ram上压头: seaming chuck水压头: hydraulic head; pressure head速压头: flow strength; q force; ram pressure头压头: head下压头: base plate压头;压: pressure head压头;扬程: discharge head; head压头表: head meter压头槽: head box压头差: differential head; head difference; head differential