QQ-39 the white long-term against Rust medicinal preparation:

 This product widespread use in the hardware, the plastic molding forms, the hardware mold, the metal product, the precise components, the work piece measuring appliance, the machinery and so on, causes the metal surface to form a sparkling jade-like stone light thin film medicinal preparation, plays lubricates and guards against corrosion against Rust role, then lets this thing and the product effective achieves long-term against Rust.