Sand suction tube before inserting sand bucket to saw a small mouth, to facilitate suck air into the sand.
Conclusion Enzyme fluid immersion and manual scrubbing are of importance for the cleaning of the suction tubes and manual cleanng and jet gun spraying can effectively remove the organic residues left inside the lumen of the tube.
Since liquids don't behave well in zero-gravity, Russian engineers devised a series of suction tubes and fans.
