激情欧美一区二区三区免费看_亚洲青青草_国产精品免费久久久久影视_日本亚洲欧洲免费无码_国产精品XXX大片免费观看_国产一级片网

Hudong Shipbuilding Sand Blasting Room

In 2001, Guangcheng designed and manufactured the largest sandblasting room project in China, which is also the first modern coating room in China. The double-cylinder four-gun sandblasting machine developed by Guangcheng was applied for the first time.