vapour r density蒸汽密度;蒸气密度
relative vapour density相对蒸气密度
vapour density apparatus蒸汽密度器
vapour density method蒸汽密度法
Surface water vapour density表面水蒸气密度
vapour density bulb蒸汽密度球管
water-vapour density水蒸气密度
water vapour density水蒸气密度
vapour density profile in fields农田湿度廓线
N（名词） the ratio of the density of a gas or vapour to that of hydrogen at the same temperature and pressure 蒸气密度 → see also relative density