The micro film protective layer is a good illustration. The protective layer of micro film is derived from the characteristics of ultrafiltration membrane. Ultrafiltration membrane is like a sieve to separate water molecules from impurities, so the micromembrane protective layer of ultrafiltration membrane is like a sieve coated with tung oil, so that the sieve is not easy to rust deformation. It is this protective micromembrane that carefully protects the ultrafiltration membrane and is more resistant to acid-base corrosion and water pressure than other membrane materials.
So this seemingly minor improvement, seemingly insignificant, actually works far beyond imagination.