|
DE643466C
|
|
Portable device for cleaning the air
|
|
DE632089C
|
|
Device for humidifying air
|
|
DE612604C
|
|
Mobile device for cleaning the air from dust, smoke and germs
|
|
DE518096C
|
|
Ventilation system with air inlet openings arranged on the air ducts and clad with grids, fabrics or the like
|
|
DE535677C
|
|
Process for sterilizing and deodorising air
|
|
DE448891C
|
|
Filters for air and gases
|
|
DE435171C
|
|
Method for determining the degree of grinding of grist
|
|
DE408829C
|
|
Drying cabinet for analytical preparations in weighing glasses
|
|
DE352459C
|
|
Procedure for main ventilation of pits
|
|
DE348470C
|
|
Press mold for the production of blades for radial wheels of centrifugal machines
|
|
DE527299C
|
|
Device for draft-free entry of air
|
