空くう中ちゅう落らっ下か

noun, noun or participle which takes 'suru'

air pluviation; pluviate

Technical term in civil engineering and soil mechanics for a method of depositing sand or granular material by dropping it through air to achieve a desired density. Used as a noun or with する.

• 空くう中ちゅう落らっ下か法ほうで砂すなを詰つめる。

  Fill sand using the air pluviation method.

• 試し料りょうを空くう中ちゅう落らっ下かさせて密みつ度どを調ちょう整せいする。

  Adjust the density by pluviating the sample.