Layered carbon fiber composites (CFC) with enhanced shielding effectiveness (SE) were prepared with mixed fillers of carbon nanotubes (CNTs) and carbonyl iron powders (CIPs) in the form of a Koch curve fractal. In the layered composite structure. glass fiber (GF) cloth was used in the wave−transmissive layer (WTL). and the carbon fiber (CF) cloth was used in the supporting layer... https://www.helpmesdicalsuppliers.shop/product-category/cpap-machine/