29620 ⎘
Auxiliary pretreatment of gases or vapours to be cleaned; Amassing the particles, e.g. by flocculation by varying the pressure of the gas or vapour
Sub-classes:HIGH EFFICIENCY TRAP FOR PARTICLE COLLECTION IN A VACUUM FORELINE
#2Air purifying apparatus and air purifying method
#3Particulate material retaining device and atmospheric acid gas neutralizer and neutralizing substance for said gases
#4Exhaust geometry for particle grouping
#5System, method, and apparatus to reduce urban air pollution