ullage

ullage
[ˈʌlɪdʒ]
noun
  1. [mass noun]the amount by which a container falls short of being full
    (容器未装满部分)空高
    ■loss of liquid, by evaporation or leakage
    损耗,漏损
语源
  1. late Middle English: from Anglo-Norman French ulliage, from Old French euillier 'fill up', based on Latin oculus 'eye' (with reference to a container's bunghole)
英语宝典
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