the ratio of air quantity and water volume  风量与水量比值

ratio of air and fuel  空燃比

ratio of water and carbon  水碳比

Ratio of water and fertilizer  水肥比

ratio of water and plaster  水膏比

the ratio of air and wastewater  气水比

the ratio of water and land  水地比例

combination of air and water  风水联合

Air-water Ratio  气水比; 里约热内卢

decreasing ratio of water content  含水率降低率

determinator of ratio of specific heat of gas  气体比热容比测定仪

effective utilization ratio of air flow  风量有效利用率

heat capacity ratio of air  空气比热容比

Invariability of Ratio of Areas  面积比不变性

lower ratio of water andglue  低水胶比

mass ratio of water to cement  混凝土配合比

mix ratio of air  配风

optimizing ratio of air to fuel  空燃比寻优

ratio of air arid water  气水比