亚洲国产高清视频_影音先锋中文字幕资源_91在线|porny|欧美_最近中文字幕视频完整

Application of atomic ash: it is mainly used to fill and decorate the defects such as pits, needle shrinkage holes, cracks and small welds of the substrate, so as to meet the flatness and smoothness of the substrate surface before the top coat. It is widely used in train manufacturing, ship manufacturing, passenger car manufacturing, engineering machinery manufacturing, machine tool machinery and equipment manufacturing, automobile repair, furniture, molds, concrete buildings and all kinds of metal products, wood products, FRP products that need to be filled and repaired