3 layer polyethylene coating API 5L line pipes are our main products,we have more than 20 years seamless pipe export history,our products exported to more than 50 countries from all over the world, the total quantity has been over 300,000 tons.
Chemical formula ZnSO4, is the most important zinc salt, for colorless rhombic crystal or white powder, its seven hydrate (ZnSO4·7H2O) commonly known as white alum, is a natural mineral. Soluble in water, and store in a sealed and cool place.
Molybdenum evaporation boats are made by rolled high temperature Molybdenum plate with the excellent characters of strength and high temperature resistance. Molybdenum boats are widely used in the vacuum thermal evaporation air, the capacitor's sinter, th