and subsequently lowering the counterpressure

Full Title

Bottling liquids or semiliquids; Filling jars or cans with liquids or semiliquids using bottling or like apparatus; Filling casks or barrels with liquids or semiliquids > Bottling liquids or semiliquids; Filling jars or cans with liquids or semiliquids using bottling or like apparatus > using counterpressure, i.e. filling while the container is under pressure > and subsequently lowering the counterpressure