気き密みつ性せい

noun

airtightness; hermeticity

Technical term used in engineering, construction, and product design to describe the degree to which a container, seal, or structure prevents air leakage.

• この容よう器きは気き密みつ性せいが高たかいので、食しょく品ひんが長なが持もちします。

  This container has high airtightness, so food stays fresh longer.

• 建たて物ものの気き密みつ性せいを測そく定ていする試し験けんが行おこなわれた。

  A test was conducted to measure the building's airtightness.