You don't know the protective tube of porous communication cable
Seven-hole plum tube is a plum-shaped communication tube formed by particles as the main material and other formulas through a unique mold, also known as plum tube and honeycomb tube. This tube has a smooth inner wall and can directly pass through the optical cable, which can save Working hours, its structure is reasonable, high use value and long life. It is mainly used for jackets of communicati