Rotary vane vacuum pumps are the main choice for vacuum packaging. Dry screw vacuum pumps, vacuum boosters, liquid ring vacuum pumps, claw vacuum pumps and rotary lobe blowers also have distinct roles in packaging. Just about every of these presents its own distinct gain based on the distinct application. https://usefulsource16936.wikissl.com/1426533/what_does_pouch_packaging_machines_mean