Put simply, the type of cells (open or shut) both permit or protect against the passage of liquids or gases. But isn’t the nitrogen that’s used in shut-mobile sponge rubber a variety of fuel? And aren’t gases Employed in foam rubber? It’s the perfect time to take a deeper dive. https://huameirubberfoam38260.designi1.com/54834160/about-rubber-foam-versus-sponge-rubber