| http://www.w3.org/ns/prov#value | - Some molding tools,such as plastics mold, after aring subjected to while working, because of existing chemical elements, such as chlorine and fluorine...etc. in the plastics the heat divide to analyze a HCI, and HF...etc. strong erosion air, erode molding tool type chamber surface, enlarge its roughness, turn worse to wear away expiration.
|
